Debian Hardware :: How To Change GCC Version To 4.3 From 4.4

I've read quite a few threads on how to change the GCC version to 4.3 from 4.4 but when i do it tries to tell me that it cannot even compile the gcc version check or something similar. Also the kernel-source is 196.x.x even though the latest driver is 256.x.x so will compiling it make a difference since it's using an older version of the kernel source, i've checked in sid and apparently it's using the same package which is surprising. The main reason why i'm going to try to upgrade from 196.x.x is because that release has frequently and does frequently stay in the higher gpu clock for no reason and also runs ~10-20*C hotter than 256 does and for me that's the difference between 65*C max and 85*C max which is a very noticeable difference.