Not sure. The book must mean 2.6GHz actually and there aren't any 100FSB 2.6's so that must mean it allows up to 533MHz FSB so as long as the cpu is 533MHz and 2.6GHz or under it should be good. When I get home I will check more about your mobo though.
Some thermal compund. I reccommend AS3. And that is really all. If you get the reatail version of the 2.6B then it should have a HSF already. Make sure it is a B not a C cause I dont think that mobo will do the 800MHz bus just the 533.