I can't definitively answer you because I haven't used the RAM in question (hans anybody?).
But, the PC-166 is the speed rating of the RAM, so it should be able to hand any bus speed up to it, including PC-100 and 133 no problem. There is just no logical reason why it wouldn't work.
However, I recommend that you buy 2-2-2 RAM that's made specifically for your machine's memory bus. It should be cheaper anyway.
Incidentally, did you find this PC-166 RAM online?