Thanks to BP, so I have such an idea. 
Let's start with this file: lf2_5MB_loaddll.rar
This file will load the dll in the same location named lfe.dll. (If you want to change the name of the dll, go OllyDBG to the address 446F00 of the exe, in which the name of the dll is defined.)
I expanded the exe to 5MB and also made it loads the dll, by adding some unused dummy resources by the Resource Hacker. So, when you use Resource Hacker to make changes on the skin, you are able to keep the size of the exe by deleting the dummies I placed, and replace some of suitable size. By keeping the size of the exe, there will be no any error due to the change of address in the exe.
Note that the size of the exe should be kept exactly 5 MB (= 5,242,880 Bytes = 5*2^20 Bytes).
This exe will work with the dll in topic The exe used for the forum mod or the dll made from LF2 DLL Framework.
You don't have to patch the exe by IIDKing or edit all the offsets defined in the dll when you use this Keep_the_size method.

Let's start with this file: lf2_5MB_loaddll.rar
This file will load the dll in the same location named lfe.dll. (If you want to change the name of the dll, go OllyDBG to the address 446F00 of the exe, in which the name of the dll is defined.)
I expanded the exe to 5MB and also made it loads the dll, by adding some unused dummy resources by the Resource Hacker. So, when you use Resource Hacker to make changes on the skin, you are able to keep the size of the exe by deleting the dummies I placed, and replace some of suitable size. By keeping the size of the exe, there will be no any error due to the change of address in the exe.
Note that the size of the exe should be kept exactly 5 MB (= 5,242,880 Bytes = 5*2^20 Bytes).
The method knowing the suitable size of dummy: (Click to View)
This exe will work with the dll in topic The exe used for the forum mod or the dll made from LF2 DLL Framework.
You don't have to patch the exe by IIDKing or edit all the offsets defined in the dll when you use this Keep_the_size method.