I do have a 360 controller. Two, actually.
But they're wireless. Is there anything you can maybe download, or something like that, that you might know of, that would allow me to connect my wireless 360 controllers to my laptop?
If not, then, I'll
consider getting a wired one.

Mate, the solution is in front of you. You do need either a;
1. an
infrared adapter, and some software that supports the controller (shouldn't be too hard to find, and a had a good one, but I'm not really interested in the emulation scene anymore)
or
2. (preferred method) use the
Microsoft Xbox 360 Wireless Gaming Receiver for Windows(known as the
Crossfire Adapter in the US, I believe)
You'll have to find a shop yourself, sorry! Highly recommend Google Product Search though! (BTW, I am still pissed off by its renaming from 'Froogle')
Linky to driver (if you choose this path):
http://download.cnet.com/XBOX-360-Controller-For-Windows/3000-18490_4-83516.html?tag=mncol;popSo, there you go! Enjoy your controller gaming! Spelunky gamepad controls still suck though! Clearly ported straight from the keyboard!