i tried using this tool last night and it took over an hour to integrate the service pack. i was also able to create an ISO of it but one thing i noticed is the lack of progress bar in the iso creation part, i was about to close and restart but then i noticed it was done already. i tried vLiting the new ulti sp1 image and installed but on the first restart i got a message saying installing service pack 3/3 100% then it would reboot and will do the same thing again. i tested it on a vLited vista without any service pack installed. i will test it again later and this time, i will not use vLite to strip down. i will install it in full to check if it will give the same issue. haven't tried the tool under XPSP2 tho. btw, my pc restarte during first logon, on the part where vista is testing for the pc's performance and etc. (i think its SAT), then it restarted. i remember when i used the latest vLite, when i removed the "disk cleanup" , vlite warned me that it is needed for that SAT thing but i ignored. im not suer maybe its because of that, but how come i got the message about the "installing service pack 100%..." dring logon.