Thanks for your response, it is a 2008 one, i call it 09 as i bought it in early 09!
the screwdriver I have gets out 3 of the 7 screws (one is missing!) it may not be the right screwdriver, but it could be that they are in too tight, they havent been touched in the near 4 years I have owned this.
I am currently trying to ring my local apple store (birmingham bullring) to see if they would help me get the stuff off the back to change my RAM. If they charge a small fee then I don't mind paying...
Ok, as typing they answered, they can check out the screws for me, and they can change them for me if they are faulty, however they cannot change the RAM as I bought it from Crucial, and I cannot change the RAM while they change the screws, but they would charge up to £80 to change the RAM for me (I paid £24 for crucial RAM). The guy said to make sure its a 000 or 00 screwdriver first, as that simply may be the problem. I'll pop to Maplin tomorrow and see if I have the right screwdriver...