What's your difficulty?

Swap Trick needs a mod chip that interrupts the 'legal' boot sequence at the appropriate point, opens th disk tray, waits just a couple of seconds for you to push the boot disk out and place the backup copy in whereafter the loading process continues.

Mod chip choice is a matter of detail. It seems that PAL PS2 users like the NEO2 mod chip; I'm a Jap PS2 user and am very happy with the first release of the modchip.com mod chip.

Does this help?