In the conditions for Task Sequence steps, the only reg key type you can use the 'exists' or 'not exists' options for is REG_SZ. I would like to see the others REG_MULTI_SZ, REG_EXPAND_SZ, REG_DWORD, REG_QWORD, REG_BINARY. Similarly, when you choose 'equals' or any of the other operators, the only options are REG_SZ, REG_EXPAND_SZ, and REG_DWORD. The other options should be available there as well.