If you haven't all ready downloaded a MAME emulator, you should download one.
I've being playing tonnes of arcade games, been playing loads of X-men Vs Street Fighter, T2 (Using mouse as the light-gun all though you can actually buy a USB light-gun to use), Aliens and many others. I'm using a PlayStation 2 USB controller, the analogue stick works are the joystick, other buttons are a bit odd but easy to work out.
http://www.kaillera.com/download.php
I've being playing tonnes of arcade games, been playing loads of X-men Vs Street Fighter, T2 (Using mouse as the light-gun all though you can actually buy a USB light-gun to use), Aliens and many others. I'm using a PlayStation 2 USB controller, the analogue stick works are the joystick, other buttons are a bit odd but easy to work out.
http://www.kaillera.com/download.php