some heat generated in the comp? compartment below (A/Cs area) is this normal?

It should be normall. Cd players generaly heat up.. They also should come with a heat sink, and that keeps it cooler. If your Cd player has a heat sink you should be fine, but if you don't, then you should try to fix that. get some heat sinks and stick them to the sides of the cd player. Hope this helps...