Coming along nicely.

I would agree that hes a bit too wrinkled, but if its youf first go with Zbrush its hard to get it looking right with out practice.

also Maya does recognise the 32 bit tif format, you have to switch it on in the plug in manager.

As for the .map files theres a converter thats available on zbrush central, worth getting a copy.

Just as a matter in interest could you do a side by side render with and withoug the specular map, as I'm not really seeing the difference in the two pics (probably just me!)