does logic pro work on windows?

No

Logic 5 is PC/Win & Mac, (also you would qualify for the $299 upgrade to L7) You can find it on eBay fairly cheep... and is still a good product... you just don't get some of the cool new toys... but you could still use it on the mini, boot from an externel FW400 drive, to speed the system up and use the internal drive for audio, or vice versa... always better to use two drives for Logic.

Been using Logic at my G/F's house on her stock mini without too much of a problem.

Still my G5 is better for it, the mini can hold it's own... I recomend freezing audio whenever possible for the mini.

I would also recommend 7.1 not 7.2 for the mini. 7.1 install disc is $29 from apple.

Which mini?

if you are asking me "which mini", it's the powerpc ver, not the intel requiring 7.2.

for obvious reasons, if you have the intel, you need the universal version.

I'm assuming that tendic has the G4 otherwise there would be little reason asking about the PC version.

I was asking tendic which mini he has. Sounds like he's a bit confused.