All installs sizes on disk are without any drivers, windows updates or bench/3rd party apps. Note: Each os has a 4096mb paging file which can be reduced to your liking.
Windows XP SP3 KN install size on disk: 5.08Gb
XS OS: 2.5Gb
Personal Stripped 3D XP: 4.9Gb
Windows XP SP3 X64: 5.68Gb
Server2003x86: 5.34Gb
Server2003x64: 5.76Gb
VistaUtimatex32:11.4Gb
VistaUltimatex64:12.1Gb
Server2008x86:11.7Gb
Server2008x64:14Gb
Windows7Starter:9.01gb
I posted this information up so that people planning a multi-boot setup can gauge how much disk space will be needed for each os + whatever benchmark apps and drivers they intend to install. Hope it helps some peeps.
Note: Installation of all 3Dapps------ 01,03,05,06,Aquamark3 and Pcmark05 take up about 2.69Gb more on the disk.