Thanks to IGN, one of my hopes in owning a PS3 have been dashed. That being I would be able to plug in Guitar Hero and rock out in non-480i. Never did it occur to me that I would have no way of actually plugging it in.
With the PlayStation 3, the only way to use wired devices is via USB, much like the Xbox 360. Therefore if you want any of your old PS2 stuff to work on a PS3, you’ll need to pick up a PlayStation 2 to USB converter (seen here). Unfortunately, these will not work with the guitars made for Guitar Hero. Apparently, when you plug in a PS2 or PS1 game, the console requires you to press the center button on the PS3 controller, which the guitar obviously doesn’t have. The second problem comes from the PS3 needing you to manually turn analogue controls on, so you can’t even switch one control for another as the guitar doesn’t have the ability to turn this feature on and off.
Sure, there will be plenty of other games that work perfectly fine with the PS3. However, it looks as if you’ll have to keep your old PS2 around just a little longer until Sony is able to patch this guitar issue in a future firmware update.
Having over 25 years of gaming experience, Zach knows a thing or two when it comes to one of his favorite entertainment activities. Additionally, he has also written many articles previewing and reviewing titles which can be found in various places around the net, including VGBlogger.com. 
Hi I think it really sucks that the ps2 guitar hero series dosnt work on ps3! but i read and then tested that if you hold the strum button up and hold select that is the same as the center button on the PS3 controller… BUT once you get the game goin the buttons dont corospond properly totally mashed.yeh. im considering to try ps3 guitar hero 3 and controller and aparently you can download old songs from previous 2 games
For anyone that’s wanting to play GH 1, I can only say:
WHY?!
The game, in comparison to II and III, is trash. It’s SOOOO hard to actually play any of those songs…even while strumming…and I’m comparing it to Precision mode on GH 3!!! I tried to play Texas Flood and Cowboys From Hell again…and it’s so retarded.
Just drop the money, buy GH 3, and forget that GH 1 ever existed…along with its flimsy, junky controller.
CANT EVEN USE MY PS3 GUITAR WITH GUITAR HERO 2 GAME