Hey Muggy, late to the party but found out that bat files should be placed in the same directory as the New Vegas.exe vs in order to work. And yes I tried your method and it didn't work sorry. Placing the bat file SPECIAL (using your content of the bat file) in C: Program Files (x86) Steam steamapps common fallout new vegas Data doesn't work while C: Program Files (x86) Steam steamapps common fallout new vegas actually works. Just thought I'd keep you updated.
Correct me if I'm wrong on this account because for some reason your method doesn't work on my pc. On Windows 8.1 if that makes any difference.
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