The Intel Core2 Q6600 Quad-Core is a 64 bit processor, so you should have no problems running 64 bit CS5 or 64 bit LR3. Now, if your operating system is a 32 bit, you will need to upgrade it first to a 64 bit OS in order to run 64 bit programs, but other than that, you should be good to go. In fact, my setup is comparable to yours (except I have an AMD quad-core) and my performance running 64 bit programs under Windows 7 is pretty good. I may at some point add some more RAM, but so far mine runs OK with 4 Gig.
Thanks Bro. Gene, I will look into upgrading ASAP.
BTW my computer RAM has been acting up for the last 6 months I wonder if it is an indication that it needs upgrade. You see once a month more of les the computer stop working I get a message that the memory module is not working. I then proceed to remove the 4 memory chips and re-install them and the pc goes back to work normally again. What may be causing this?