Thanks for the suggestion! I'll give it a try. I did try GNU PSPP for a while but it wouldn't work with the SPSS files I got from SPSS 17 (and well what's the point of reduplicating my efforts when I'm using SPSS at school).

Well Linux doesn't require that much space to run the operating system on. So it really depends on how many applications you plan on using.

I usually give / around 20 GBs and it's currently around 15 GBs used (mostly because I have alot of n800 back up image files on it since I use to do them monthly). I usually do a 2-3 GB swap and the rest is Windows. Since Linux can usually read and write to NTFS I just keep all my media files on there so if I'm ever in Windows I can still access them.

So regarding your question I'd say maybe 10-15 GBs just for Linux (you could probably do slightly less if you wanted). If you want to put /home on a seperate partition (I don't bother since as I said I keep most of my media and document files on an NTFS partition) then maybe around 5 GBs for /home and the rest in / for the OS and applications. The rest could go to Windows 7. I think that's how I have my laptop currently setup (came with 160 GBs though really around 140-150 if you take away the part that's used for a Vista recovery partition).