If u intend to play a lot of dvd-rips (you know ... those ones u can dl from the net or make yourself) u should get a high toc ps2-cd-disc.
Most dvd-rips (cd-r) are big, like 700mb in size.
You wont be able to play any cd-r larger than 632mb-ish (theyll stop bootin if bootin at all). I estimate u can only play 1 in 3 dvd-rips without a high toc disc.
There are 2 know high toc cd-discs:
Breaker Pro-cd and HDAdvance-cd.
I recommend the Breaker Pro-cd because u can use it to boot ps1-backups too.
HDAdvance-cd is part of the HDAdvance-set (cd+dvd) and u can use it to get your dvd-rips onto a ps2hd (if u have one).
So u can boot 99% of all dvd-rips if u do this:
Boot sm-cd (or sm-dvd)
swap in cd-loader (or dvdloader if u booted sm-dvd)
press x (cd-loader boots)
press eject (tray opens)
insert your real high toc cd-disc
press eject (tray closes and reads your disc as above 632mb)
swap in your dvd-rip (cd-r)
and it boots
Heres a few more links:Links
PSP 1.52 (DG), DS 001, XBOX v1.6B+Cheapmod+120GBHD, SM33, 50004+HDA10+120GBHD, SM32, BP11, 3900X, XBOX v1.6+Softmod, P4_2.666, GBASP, GBA,Celeron_700, DC, PS1, P2_300, TI85, Saturn, GBC, GBP, Megadrive, P75, Amiga 500, MS, 486SX25, Amstrad CPC464, ZX81