I'm just saying, we don't know what the configuration the OP has. When we hear back from the OP on what configuration that he has, than we can assist him with his question better. Like stated before, most people don't even have a D: drive (2nd hard drive), so we'll see. More than likely the D: drive is the best option, but I'm not going to assume anything at this point. I've seen too many fool things happen with setups over the years, so I'm reserving any judgement until we get some more information.
Muradw2: What is the size/type of your C: & D: drives, out of curiosity?