:tt1:  SVDL - I've heard that Vista handles Memory different.  Is adding this 3GB switch ncessary?  And is Vista's Virtual Memory allotment, per disk, actually more than 4GB; is there a limit?

Also here is what my XP Pro Boot.ini looks like now:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect

Do I want to change this to just look like:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)WINDOWS="Microsoft Windows XP Professional"/3GB /noexecute=optin /fastdetect

Also, what would happen if we just wrote in /4GB, /5GB, etc.?