magic 3 and patches
 

i have a mgic 3 mod chip installed in my ps2 and a copy of tekken tag tournament and gta 3, my cd re-writer is 100% compatible with clonecd. Do i need to patch a 1:1 copy of tekken tag?

No... As long as your writer is 100% compatible, there is no need to patch (unless you are wanting to patch PAL to NTSC or vice versa)