Just thought I should let everyone know that I fond the fix to this problem, it's actually a very simple fix. It was something your said moral that gave me the idea, "Something has changed", so i started thinking what had changed in the Mod, and the answer was, I added an event sound ad on to the Mod, (Team Radio 2.0 by Lewis-Hamilton00) that i got some time ago, and let me say its one of the best I've used in the game. Unfortunately it caused all the lagging, when I took it out the game went back to normal.
That was the reason and I'm quite sad about it because I really do like it a lot. So there you have it in case someone else has the same problem. Maybe it needs so tweaking done to it or its just my computer, who knows.
Skreeth.