[daveat]

what i do is either first remove the whole shroom for the original rock (peel it off so that it is whole) then cut it in half, sometimes if it is big enough i will cut it into 1/4's then i place them in a pop bottle bottom with some live rock rubble. this lets them sit on the rubble in a low flow area and attach all by themselves.

if you can't get them to readily peel off the rock (first step) then cut them in half making sure to go through the mouth then try to peel off one or both halves as this makes them easier to get off sometimes

you can go to frags.org and get some more info on shroomin as well as other corals