Hi Phillip,
Let's start with your colt coral, why not frag them instead of move them if they are healthy? Here's a great article on an easy way to frag colts:
COLT CORAL PROAGATION
Garf also has a nice description on how to frag xenia (very easy). Take a look:
REEF AQUARIUM FARMING NEWS # 27 p 3
If you don't want to frag the xenia, just wedge the rock into a crevace where you want it to spread. Eventually the stalks will attached to the other rock and you're cood to go. Takes a few weeks, but coral propogating is act of patience.