You will want to get a drip acclimation for all of them. I normally do it for at least 1.5hrs for zoanthids. Liveaquaria has a great guide for this so here is the link.
I prefer the drip method.
http://www.liveaquaria.com/general/general.cfm?general_pagesid=19&ref=3319&subref=AI
Now. Once you get them acclimated you are fine to put those still attached to the shell in your aquarium. No need to attach them to anything else. The polyps that are loose you will need to catch those and attach them to a rock or shell.
Here is what I do to attach zoas (single or more). I use Paper towels, super glue gel, tweezers and a razer blade when cutting.
1. Collect them into a small dish (can be a zip lock bag placed into a bowl or tupperware)
2. Get some good paper towels cause you will need them to dry off the surfaces. Then dry off the rock you are going to attach your zoas onto.
3. Take a polyp or more out of water and place its bottom onto the paper towel so it dries off. If you can't figure out which is the bottom then poke at your open zoas and examine what the polyp looks like when it closes. It can be very tough to determine top from bottom on losse polyps.
4. Put a small dab of glue on the dry rock. The dab will be just a bit llarger then your polyp.
5. Pick up your zoa with the tweezers and place the bottom of the zoa on the super glue. If the polyp is larger then no need for the tweezers. (I started using tweezers after glueing a polyp to my finger)
6. Wait a minute to dry and place it back into that container with water.
Once the glue is solid and your polyps not moving you can put it into your tank. Single polyps don't always glue down easily so don't be surprised if it is floating around your tank the next day.
hope that helps
