Ok it took me a couple days but i have worked out for myself (my own problem that i have had with the game) and now i know how to fix it 1st haev the game uninstalled, update your Direct X the Drivers and graphics driver to at least 175. then download the newest patch 1.02 i think, then find the link for paul.zip its actually a DLL that a Client of ubisoft has posted on these forums somewhere, ok then go to gameburnworld, then download a cd Fix and patch the game with the new pacth then put the paul.dll file in the SCDA_Online and offline in system in your game directory, ok now you replace the splintercell4.exe and online exe with the no cd key patch from gameburnworld, anyway hope this helps someone, if any queries contact me playstationjoel@hotmail.com,
Cheers and good luck XD