I have v1.61, I am not sure if that is the same as yours, but it was the newest version when I got it. I did this a few months ago, so bear with me if I do something wrong. Because I suck at telling how to do things, I have attached some pictures.
(1). Find your MameWah.ini file and open it.
(2). Once the file is open, look under "Misc Options" and change the "Layout" options to the name of the folder which you have your layout in.
(3). Go to the folder you have your layout in. In my situation, it is in D:\Mamewah\layouts. I am not sure, but I am pretty positive that your layout folder must be here. Make sure and name the folder which contains your layouts and images the same thing you named it in the Mamewah.ini.
(I have my sound files in this folder also. Notice that they are named appropriately for the events in which they are used. Also, notice that they have the extension .WAV in capitals). (4). This part is a little harder. Notice that the images are named for the exact events in which they are used. They MUST have these names. In my layout, I have one main image, and just a small text image that changes for each different emulator.
Main = My main background. It is used in every scene.
NES-art1 , Mame-art1 , ZSnes-art1, etc. = The Small banner that changes for each emulator.
options = The option screen that pops up.
Message = The message that appears before a game loads.
layout.lay = Main layout.
Mame.lay, ZSnes.lay, Nes.lay, etc. = You need to create layout file for each emulator. Make sure to
name them the same as your emulator.ini files.
So, this is how it works. There are a few different types of artwork:
Main
Options
Message
Art1 - Art9
Now, naming the files like this, will make them universal images. If you want images to be emulator specific, then name them like this:
WhateverEmulator-Main
WhateverEmulator-options
And so on.
But make sure that the labels you give for "WhateverEmulator" Correspond with your emulator ini. files.
If I just totally confused you, then check out
http://wiki.arcadecontrols.com/wiki/Mamewah_Skins . It has most of the answers.
Anyway, I hope that helped.
Just as it is,
FlipWillie