It's probably advisable to backup or make a copy of pack 2 if you like me you have the level pack installed, otherwise you will loose the levels.
cgarvie are the custom levels the first ten levels?

I don't want to replace my whole pack2
so it's it just a case of moving
Level1.lua
Level2.lua
...
Level10.lua
from Mypack to Pack2?
or are the Level numbers actually mixed up?

Thanks