play ps2 games without modcip

[wilco02]

i have a ps2, and my question is can i play import/backups games
(i don't want to place a modchip.)
without a modchip????

i have read something about a swaptrick???
I have a pal ps2.
and downloaded action replay v2.20 is that enough or do i need a kind off a memory card for the action replay. I must patch the games for the swap trick??

Or are there more options to play games without a modchip?

And does any one know a good site where i can find this info, because each site tells different things.

thanks.