You know I think I say this so much I need to put it on a t-shirt lol. Before installing any ep or stuff pack, it's a very, very good idea to back your game up and then pull the downloads folder right out of your game. After you've installed the new ep/stuff pack and have made sure it works, then reintroduce your downloads, saving the hacks for when you know they're compatible.
I realized after i posted it wasnt to do with the new stuff id just installed, to be honest im fully sure why i posted that. See i installed the stuff packs first and it worked. then i started downloaded mesh's thats when it stopped.
But our right i should of backed up my files first, didnt think of that with the stuff packs, i would of with the ep's.
Um the hack confliicer is a programme you can download, it scans your download folder for any conflicting files and then tells you they are conflicting. good way of finding out any bugs with hacks, but it was mesh's i downloaded. Oh well its working again now. just got to check each time i download some stuff each time.
prolly better to do it this way anyway.