in reply to architecture width ?
I am not specialist at all on that type of issue, but I would say that (1) A 32-bit version should work without any problem, and (2) if you want to take advantage of your 64-bit hardware/OS, that it is better to get a 64-bit release.
Two cases in point:
- I had a Perl program that failed when the hash grew too big on XP just shortly before having loaded all the data, it now works very fine on Windows 7 and 64 bits.
- On a totally different subject than Perl, I spent 3 hours a few weeks ago to prepare a very large picture for printing because of lack of memory (several programs failed before I was finally able to do it), I tried again with my new instal (Win 7 + 10 GB memory), I made the same thing in less than one minute.