wow, just wow astrosfan...sure he needs a thick skin especially when there are uncompromising jerks like you..
how is his question any different from the 100s of posts in every hardware forum asking if this piece of hardware will work on my pc, etc. do u go to all those threads and post this crap?
Asking if a video card works with a certain motherboard is very different from asking about an emulator. Unfortunately, when someone asks about an emulator they are, within reasonable probability, wanting it to run illegally obtained software. But since he's only 12 and wants to play PS3 games, without a PS3 he probably doesn't know or care that playing downloaded isos (or whatever format the game needing emulation is in) in emulation is illegal. The reason for all of the 'technical difficulties', as he put it, is because Sony has spent many many dollars creating the hardware and software producing these 'technical difficulties' to protect their product and business from lost revenue due to illegal activities.
However, the above is under the assumption that he is wanting to play a PS3 game, illegally obtained, on his computer.
But, since he is 12, and like my 12 year old son...maybe he is interested in developing his own game and thinks that if he had a PS3 emulator he could do that on his own PC. For that question, the answer would be that Sony does have a developer's kit, but that too will not run on a PC, but is essentially a PC itself. The SDK is used to make games for the PS3. They did drop the price on them to like $10K as it has all of the hardware with the 'technical difficulties' that cannot be emulated. But, you'll probably have to setup a company to purchase. The first google search returned for PS3 Dev kit is this:
http://www.engadget.com/2007/11/19/sony-slashes-ps3-dev-kit-cost-by-half/
Also, the Sony SDK has been leaked and can be found on the web, but that is not legal either...and would be easier to just legally purchase their SDK.
So, bottom line is at the current time there is no legally (or even illegally) working way to play PS3 games on a PC. The easiest way to play PS3 games is to obtain a PS3 and obtain a PS3 game.