No idea what happened but I decided to try and see if radeonpro made the game run smoother, and so added a profile, when it went to run the game it gave me unhandled exception errors.
So I removed profile and ran the game normally.
Now the game lags like crazy unless I switch off enb, tried reinstalling mod, uninstalling GTA3 from scratch and reinstalling then the mod and the same issue occurs.
No idea what radeonpro changed but it messed it up.
EDIT : more strangeness, I decided to make a new profile then put triple buffering on, and anti aliasing etc and suddenly ENB works! still dont know why it stopped working first time or crashed radeonpro originally originally though the only difference I did was rebuild the img files though that alone didnt stop the slowdown until I reopened radeon po.
Edited by dekaspace, 23 January 2013 - 04:09 AM.