Say I got an ISO... how would I go about burning it? And do I need a mod chip in either system if I have a gameshark for both?

To burn an ISO you would normally just use something like Nero. Now, playing the damn thing is where it gets difficult. I'd give up on the PS1/2 all together, and just use an emulator for it. If you must though, check <a href='http://forums.psxforum.com/showthread.php?threadid=2041' target='_blank'>here</a> for the PS2 games, and unless you want to go through a hell of a lot of trouble, I'd say you should get both Modded.

I dunno. Modding is a bit risky if you don't know ow to sodder and shit. I've heard some good things about those boot disks you can get. Where you basicly put the cd in, let it load up. then it gives you and screen saying to place the game in. It a lot safer then opening up you're console and altering it try that, it cheaper to in some cases.
<a href='http://www.playstationmodchip.com/product_details.asp?ID=1900' target='_blank'>http://www.playstationmodchip.com/product_...ils.asp?ID=1900</a>

I've heard mixed reviews on those, so do some research before getting one.

<!--QuoteBegin-UntrueDeath+Apr 12 2004, 01:50 AM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (UntrueDeath @ Apr 12 2004, 01:50 AM)</td></tr><tr><td id='QUOTE'><!--QuoteEBegin--> I dunno. Modding is a bit risky if you don't know ow to sodder and shit. I've heard some good things about those boot disks you can get. Where you basicly put the cd in, let it load up. then it gives you and screen saying to place the game in. It a lot safer then opening up you're console and altering it try that, it cheaper to in some cases.
<a href='http://www.playstationmodchip.com/product_details.asp?ID=1900' target='_blank'>http://www.playstationmodchip.com/product_...ils.asp?ID=1900</a> [/quote]
yeah, i also read a Gameshark will let you boot. But I've been unsuccessful in getting the SNES on PS2 emulator to work. Then again, I do think it requires it to be modded.