Yes, and as far as I know, I'm the person to talk to here regarding softmodding a PS2. I was into PS2's long before I had a PSP.
There are several methods to doing it, the best of which involves building your own savegame, using an Action Replay/Gameshark/Codebreaker to move the save to your mem card, and then using a PS1 game to boot it.
Another way is to decompile a PS2 disc that contains multiple .elf's. An .elf file is a PS2's executable, very similar to a PSP EBOOT. One of these games is 007 Agent Under Fire. You can decompile the disc and replace "driving.elf" with a uLaunch (file browsing program for PS2) .elf that has been renamed to "driving.elf". Start the game with the original disc and do the swap trick to switch it out with your burned disc. Then you play the game until you get to a level requiring you to drive a car (driving.elf remember?

). As soon as it loads the level, boom, uLaunch starts and then from there you can launch the Free MC Boot 1.8 installer.
Files; I'd just get the n00bie package.
SKS Apps - Exploit Systems - Wii Ps3 Ps2 Apps - Homebrew Game Downloads
SKSApps has been iffy lately, they're replacing some server stuff. Their guides section is down but I'm sure it'll be up again soon.
Let me know which method you'd like to try and I can walk you through it on MSN if you'd like. It isn't easy but you'll be very satisfied with yourself when you're finished.
