Ahh, I have found how to counter this problem. First, you must NOT edit the text of the wad in the Wad Editor itself! Do that by exporting the *.lmp, editing it with Notepad, and replacing the *.lmp with the one you edited via "Entry" --> "Replace." :p Second, If you followed step 1, put in the frames (With the last two types lower case), replacing SA2 Shadow and NOT your already-edited-Shadic, and are using XWE, Rename "[inseart wadfile name here].wad.001.bak to "[Inseart new name of WADFile here].wad." If done correctly, Your WAD will no longer be falling. And I'll begin was right, Throw the WAD you made in the TRASH. Also, the SKINNAME in MAINCFG has to match the name in S_SKIN.
WHEW this was long to type. But not as long as others. lol[/u]