I'm really sorry imp but I have tried everything I can think of and still cannot get the mod to work. Can't find any online posts from people who have had the same problem or anything.
My last hope was to find my old cd version of the game but I have looked all over my parents house upside down while I was back this weekend and sunnies I must have pawned it after I bought it on steam.
If no one else has any suggestions at all about what I could try then I suggest starting to look for a replacement to hopefully not slow the game up at all. I do apologise, but it is out of my control and I don't know what else to try...