Hi Vergil,
Thanks for the reply. :)
Unfortunately, any permutation where the EXE is in compatible mode (tried all the modes too), TexMod just shows the error dialog.
Also, renaming the EXE without compatibility settings works, but GFWL doesn't launch so I don't get any saved games. :(
This is also true of having TexMod somewhere else (in my G:\Stuff\Tools folder), and creating a copy of the BatmanAC EXE and running that (both with and without admin/compat settings).
At the moment, to view the mods, I play without saved games with TexMod in one folder, a copy of the EXE (BatmanAC - Copy.EXE) in the Steam folder (GFWL doesn't launch - I imagine it's something to do with the EXE file name).
I can't get saved games & mods to run at the same time, so there will always be some I can't see unless I play through without being able to save each time...from the beginning.
It's frustrating as it all worked when I first found this forum. I'm just assuming something has patched since then.
Hey ho. Maybe I'll have a flash of inspiration some day!
Thanks again!