I am making progress, but having issues building my own BartPE disc. I have isolated the problem to be with PEBuilder. I am trying to simply build a test BartPE (no media output), edit the bartpe.bmp wallpaper, run PEBuilder again using F5 to create the ISO. I am doing this to prove to myself that I can alter BartPE's file structure and still burn a bootable disc (without going through the trouble to add my windows UA folder) I have discovered that if I build an image and select create ISO or burn DVD from scratch...I have a bootable disc. HOWEVER: If I build a BartPE folder...change nothing in the filestructure...and then try the F5 build option I get a non-bootable coaster. (gives error "CDBOOT: NTLDR not found") I have verified that SETUPLDR.BIN is in i386 and it is in caps (though I changed nothing in the build folder so I would have no reason to believe this had been altered, I saw lots of threads claiming that this was almost always the cause for my error msg) Considering I didn't make any changes at all to the BartPE folder before hitting F5 I'm forced to assume that the issue is with PEBuilder v3.1.10a. So I tried building an ISO using IMGBURN: Bootable disc No emulated type boot file: BartPE output bootsect.bin Load Segment: 07C0 Sectors To Load: 4 File System: ISO9660 ISO9660 Restrictions: Folder/File Name Length: Level X - 219 Characters Character Set: Standard Allow More Than 8 Directory Levels Allow More Than 255 Characters In Path Allow Files Without Extensions Don't Add ';1' Version Number To Files (complements of CDOB ) I chose the BOOTSECT.BIN file in the root of my BartPE folder and still the resulting ISO gives me CDBOOT: Can not find NTLDR error message. CDOB, if you're still out there, could you attach your IMGBURN build project file for me to try? Perhaps I am missing something there... PS- I'm testing my ISO's using VirtualPC so I know the problem is not with my CD-R's. Thanks again in advance!!!