Can you play 2-player games with PS1 Eboot games?

hi,

I would like to know if you can play 2-player (or more) PS1 games on the PSP?

Like, I just ripped Crash Team Racing, and put it on the PSP, but I was wondering if its possible to play 2-player mode in it?

Anyways,
thanks in advance,
~Moon_Lit_Shadow

only with ir shell (and even then, its limited)