Connecting to a PS2 via USB?

[LunaMoo]

Most of such things doesn't really copy any content from other game even when they display "copying files" or anything fake like that, you already have it and it's just locked behind a check that could be described as "please buy our another game on different platform so we will unlock extra content on the disk you already bought". Pretty much just a stupid advertisement:|, publishers probably get extra deal from sony for promoting their hardware at the same time.
Just needs someone with the game to find where that check is and make a cheat which always say "yes I bought your other game on different platform, now give me stuff" or if it's not a separate mode, just unlockables, directly add it to your "unlocked stuff list" via simple cheats or even 100% save from any site like gamefaqs.

In fact just a quick search and they're there, one 100% with psp stuff and another clean save which has almost nothing, but the PSP exclusives.;]