I want to install OSX on my Toshiba Satellite A200 without having to uninstall the current operating system(Vista Home Premium). Basically I want to dual-boot on a laptop with the following hardware:

Intel Pentium Dual CPU T2370 @ 1.73 GHz
2.00 GB RAM
Graphics: Mobile Intel(R) 965 Express Chipset Family
Video BIOS:1436
WiFi Card: Looking on the back, I think it's AR5BXB63 (possibly PA3613U-1MPC)

What would you reccomend?
Also, how would I find out my exact WiFi card from within Vista?