Using all rimms on TH7 II...!!!

For the moment I have 2*64mb Samsung PC800. But I´m planing on getting 2 more sticks(I´ll be using 4*64mb)....do I have to use registerd memory sticks?
Or is it only when I´m using the max amount of memory that the rimms can handle..???

I think that if you keep them in pairs, you won't have much of a problem.

Ok..thnx m8