In the conditions for Task Sequence steps, the only reg key type you can use the 'exists' or 'not exists' options for is REGSZ. I would like to see the others REGMULTISZ, REGEXPANDSZ, REGDWORD, REGQWORD, REGBINARY. Similarly, when you choose 'equals' or any of the other operators, the only options are REGSZ, REGEXPANDSZ, and REGDWORD. The other options should be available there as well.