Does it require a powerhouse computer to run?
(I'm going to be buying a new computer anyway.)
Nah, it pretty much comes standard with Windows XP systems anymore.
It runs on my 3 systems:
#1: AMD Athlon 2800+, 2.13 GHz, 1 GB RAM (512MB 2100 DDR, 512MB 2700 DDR)
#2: Pentium 4 2.80 GHz, 512 MB RAM
#3: Mobile AMD Athlon 2800+, 508 MHz, 448 MB RAM
So if the one you're buying is good/as better than those, it should work fine.