Just pick the 3.3.1 (new) exe. one, and install it like any other program. The options I was on about are it will have check boxes for if you want to install ask toolbar crap or whatever, set homepage as yahoo, something along those lines. Just be sure to uncheck that stuff. It might say, without these features installed, you won't have these options with the program, etc. You can just ignore that if you want. And near the end, it will also ask if you want an ebay shortcut on your desktop, just uncheck, etc.
It's 32 bit, yeah.