i also running out of solutions. but playing with fraps is not a solution, cause it records still video and loads my hdd until its full :). i contacted gog and send my dxdiag. hope they can help.
edit:
i took a closer look on all *.cfg files. at Enclave\Sbz1\User.cfg i found a line "NOPREDICT=0" and set it to 1. After starting the game i plays very slightly better, now i can look around without this "lagging", but still if i fight or run at the same time i move my mouse the character moves like he is on drugs. runs way to fast or runs on its own, when i take my hands of the controls and mouse. so that there is no misunderstanding, the hole game runs on perfect speed, its the char you play who messes all up at looking and turning around with the mouse.
i also tried the "SYNC=0" line and set to 1, but there it gets stuck on the level loading screen oder screen goes black, so i turned it back to 0.
Post edited July 27, 2011 by Hoshi82