question about booting games without a mod-chip

[zcx]

Ok people told me that I could boot my ps2 games without a mod-chip but in the long run it would damage my ps2, so i went out and bought a gameshark 2 and made a backup up tekken tag tournament, do i need a patch? I have a US version 4 ps2. And can someone give me instructions on how to do this? thanks.