need help booting ps2 games

[whateva]

i just started to order copied playstation2 games and play em but i can't get 4 out of 12 games to boot up ;batman vengence, Madden 2002 , dynasty warriors 3 , victorious boxers, what should i do ? ( i think i ahve the neo 3 mod chip I order my playstation with a mod in it so i don't kno what neo I have for sure

[dust2dust]

i got bits of advice
if they r dvd(r) games u will need to boot them with an origanal dvd game with a bigger toc(not sure if they r dvd sorrysearch this forum for post by me or dvdr boot i posted it her about 1 month ago

or as u say u bought them maybe if they r cd based games i would say bad copies