I posted a thread about it, and someone else did as well; it seems a few others are having trouble with this, so here is the entire ordeal with solutions included. Concerning Vlite: Vista would not boot with more than 4GB of ram, so I decided to integrate SP1 with Vlite to avoid having to take ram out of my system every single time I needed to format. I discovered that it isn't SP1 that fixes this, but the hotfix located at http://support.microsoft.com/kb/929777 . I integrated SP1 and tried it, and it still gave me the BSOD when trying to install/boot. After this, I tried integrating SP1 and THEN the hotfix, but it kept giving me an error saying that ntoskrnl.exe could not be found. Booting with only SP1 integrated would get me to the 'loading' screen of Vista, but only along with the BSOD because the hotfix wasn't added. After integrating SP1 and then applying the kb929777 hotfix, it gave me the 'ntoskrnl.exe could not be found' error/screen. It is noted that you should only apply hotfixes with vlite AFTER you integrate SP1, but let me explain why this isn't always true. Integrating SP1 only would get me further along in the install process than with the hotfix because it would go to the Vista screen with the green bar that scrolls, but it'd give me the BSOD because the 4GB hotfix wasn't applied. When I tried integrating SP1 and THEN applying the hotfix (as it says -- you should apply hotfixes only after integrating SP1), it would give me a new error saying that ntoskrnl.exe wasn't found. I wasted a grand total of 8 or so DVDRs with tying to get this working, but the 9th one worked (and I have to mention that my 9th DVDR happened to be my very last blank DVDR ). Let's see how I did it. After integrating SP1 and having the BSOD, I tried integrating, and then the hotfix; however, along with the hotfix -- I decided to use an unattended setup, as well as tweaks. I started thinking that maybe the tweaks/unattended setup was messing it up, so I did nothing but integrate SP1, then apply the hotfix, but still got the same error =/ I tried all kinds of methods as far as what to take out/apply to Vlite, and also integrating, closing the program, then coming back, etc -- all kinds of combinations, but none worked and it gave me the same error. I decided to apply the Hotfix ONLY and not SP1, and to my surprise, it started working with 8GB of ram installed. Both SP1 alone was working (but BSOD because of no hotfix), and the hotfix alone was working. I avoided applying any hotfixes whatsoever because it says in the program (also in guides) that applying hotfixes must be done AFTER SP1 is integrated, but this time it isn't so true. What I did on my last try/last DVDR was apply the 4GB hotfix to a fresh copy of Vista, and then integrate SP1, even though I had to go against what I had been hearing. I also decided to do the tweaks and an unattended setup, although I thought that might have been what was giving me the errors. Apply the KB929777 hotfix BEFORE you integrate SP1, and make sure that when you insert it into Vlite -- click the '4GB fix' option that puts a check mark into the program so it will work when you're trying to install it as well. After this is applied, integrate SP1 and all other hotfixes, as well as any other modifications and the unattended setup. The reason I'm making this long/a big deal out of this is because the possibilities for errors may be endless because this is only what I was experiencing -- not including the other trouble others may have. Some thoughts that come to mind is that maybe it's necessary to apply hotfixes before SP1 was out BEFORE you integrate SP1, and then hotfixes released after SP1 are ok to put on after SP1 is integrated. I think this is where my trouble came from. I think this will be an important thread because these days -- most will want 4GB ram when installing Vista, and I think Vlite users will try to do the same method that I'm doing. Maybe some of this info should be added into the program help/the guide on the site? Other problems not related to Vlite, but very important. Vista doesn't like 4GB of ram when installing/booting, so the hotfix mentioned above is necessary. Taking out your ram is a pain -- especially if you format a lot, so Vlite seems like a logical option. However, there is another problem here: hang ups. I started getting random system hang ups and I had no idea why. I discovered that increasing your ram voltage solves the problem. It seems that motherboards/Vista/etc have a hard time powering up a full 8GB of ram (because it's all 4 slots), so increasing your ram voltage is necessary with Vista if you're getting random system hangups. Ohhh god does Vista not like ram... After a couple of weeks and countless hours of testing/tweaking/crying in between, I finally have a fully-working system with no problems. Here's how I did it. Increase your ram voltage if you have system hang ups. Mine was set at about 1.9v, so I increased it to somewhere around 2.2V, after much research. No more hang ups! Copy your Vista files to your HD Apply kb929777 hotfix in vlite (make sure to 'tick' the 4GB box that appears in Vlite after inserting it) Integrate SP1 (make sure you apply hotfix kb929777 BEFORE integrating SP1) Apply any other settings in vlite Burn directly, make iso, etc That should take care of it. It took me a couple of weeks and many hours of testing/researching to figure all of this out, but it's finally done. The system hangups because of the ram voltage made me almost give up, and then getting Vlite to make a proper working version didn't help, but I got over all of it just fine. I thought I'd leave my experiences here for everyone to see because I think it'd be useful. I'll stick around for a bit longer, but I won't be visiting the forum in the future very much since I worked out my problems =) My system specs are below. Intel Q6700 Quadcore 8GB Corsair Ram Asus P5N-E SLI 2 500GB SATA HDs Nvidia Geforce 8600GT Windows Vista Home Premium (64bit) Let me know if anyone has any questions.