In this post, I'll detail the steps needed to get an emulator installed, how to download the games and how to convert the games into a suitable format and what you'll need to use your PS3 controller as input device should you desire such a thing. The emulator has a small cost (currently it is £2.61 or $4.10)
Be warned, it isn't all that straight forward so a certain amount of geekery is recommended! If you have any problems, just ask in the comments section.
Also, be warned, emulators and the games you play on emulators (called ROMs) can be a bit of a grey area, legally speaking. My best understanding is that you have the best shot at staying legal if you own the console you are emulating and own the games that are being emulated. I'm no lawyer by any means, so seek your own legal advice and conscience before diving straight in.
