Here's something you can do to save your zombie set/any set incase it gets eaten by the server.

This is a trick I found a little while ago. Not sure if people know about it.

It does not involve Spell Data.

Set Transferring
This is useful because it acts as a kind of "deer wardrobe" but using pictos/deer instead of spelldata to hold sets.
(I've also no idea if this works between different game versions that have the drinkplaats)

You Will Need:
A spare picto (doesn't matter if what's on it is a fawn or deer)
The Drinkplaats.
Connection does not matter.

Step 1:
Go to the drinkplaats with the deer who has the set you want to clone/transfer. Drink from the fountain to gain a transformation. Keep the transformation and stay where you are.

Step 2:
Remember to stay transformed, swap to the deer you want to transfer the set to (you do not need to disconnect/reconnect). Your deer will appear nude and transformationless but that's okay.
NOTE: I just tried this again and did not appear nude and kept the transformation when I swapped. This is still okay and continue to step 3.

Step 3:
Take another drink and get another transformation (or if still transformed you dont need to get another transformation). This time round run out the drinkplaats.

The following may happen:
You will come out with the transferred set. Save it.
You will come out nude. Load the set. Save it.
You will come out nude, load the set and some of it is missing. Try loading it again. Save it.
^ If this happens again try to run in the drinkplaats and out again.

And there you go, you have just transferred/cloned a set B)