question

I formatted my pc and made two partitions, one with 40960MB(40GB) and another with 250GB(more or less)

I installed my OS (windows xp 32bit) in the 40GB partition, my question is:

Can I install programs, for example windows live messenger or steam, in the 250 GB partition (where there is no OS)?

ps. sorry if I couldn't express myself in the best way possible.

if i can change installpath,?! do you mean the directory, like D:/blalbalbal/sda.exe

Random question:

Does that increase speed? I got on my OS drive (my pc was laptop was preinstalled) like 100gb,using them for software,and the other partition,which is 400gb,for renders of movies because they are getting really big. (I need them atleast until I finish a movie :P)