What kind of training do I need to use open source programing code?

Hey I want to know what kind of training will I need to use open source code from programs like Mame or Final Burn, emulators. If the rumor of the PS3 Hard Drive coming with Linux, I want to make a emulator in which people can play 4-6 player arcade games (with legal roms of course) on a TV through a PS3. I’m currently trying to get back in school to get a degree in Infomation Systems with a consentration in software, cause I want to become a game developer, but I want to start with using open source to see if I have the goods to make a good interface.

Is it possible to host multiple wordpress blogs on my godaddy account under the same domain?

I have 4 wordpress blogs that I would like to host under my godaddy account. I currently have one up, but I can’t figure out a way to have the 2nd blog up under the same domain name. I would like to have them up something like this:

http://www.mydomainname.com/wordpress1
http://www.mydomainname.com/wordpress2
http://www.mydomainname.com/wordpress3
http://www.mydomainname.com/wordpress4

does anyone know how to do this?

Thank you in advance for your help!