[tpunx99GSX]

at my work we have our boot at 12, it was set up that way when i took over as IT admin, I would have definatly made it much bigger, mainly because on our domain controller when we run out of space due to temp files or logs or programs that got installed on the c but should not have, first thing windows does is erase all of our server licenses. (Smart fucking thinking Microsoft) so it basically brings our entire network down until i can get in there and load the licenses.
I actually like windows 2003 server a lot, and its great on the admin side.
In december we will be moving to new servers running windows 2008 with HyperV, and honestly i cannot wait, server 2008 with hyper v is sweet, i have it loaded on a test environment and the admin and roles work like a dream, and hyper v is pretty cool. (not to mencion install of server 2008 took all of 15 minutes.)
Dont leave everything on the C: that would be a horrible decision. only the OS should go on C: offload everything else to another partition including the sql servers. are you using the windows 2003 as a domain controller? if thats the case best practice states that domain controllers should stand alone with no other programs, then build an app server for all the other programs such as CRM, databases, accounting software and such.