[SOLVED]help on not getting banned

hey guys its jozza. Im fairly new to hacking and all but the first time i got mw2 about 2 months after i got it i was banned, i dont know why but yeah i got the game again got banned about a month later (again dont know why) then i got the game again then got banned again but this time the steam guys said it was there mistake and gave me left for dead 2 and mw2 back but i didnt know the banned me and kept using vac chaos to make modded lobbies so i got banned for real then. Finally got the game again then im here just bored of mw2 like most people i wanna host modded lobbies and run walls cause im sick of going into every lobbie with a hacker so can someone give me some help on how to not get banned from modding and all aimbots walls ect... Cheers, jozza.