To those that are still having the save issue, make the .bat file as described on the first page of this thread.
Here's a much more robust batch file for you all. This fixes my problems with autosave and quicksave, and will probably solve people's issues with their ini resetting, too, although I never had that problem. I edited the ini in order to disable mouse acceleration and it has never come back for me. But my quick/auto saves gets messed up every time I quit and relaunch the game.
Anyway, here's the batch file. It's better because you can save it
anywhere you want, it doesn't have a bunch of excessive "cd .." cd..", and it works no matter where you chose to install Steam.
It's pretty clear what you have to change to personalize it: those two variables near the top.
NOTE: There must not be any spaces around the = signs. The steamFolder variable should not end in a slash. There are quotes around the steamFolder value in case your path contains spaces like "Program Files". My path does not as you can see, so I didn't need the quotes, but I added them anyway to make it easier for you all.
Just like the other one, open Notepad or any text editor, paste in the lines below, change the two values for steamID and steamFolder, and save it as WhateverNameYouWant.bat (For instance: NewVegas.bat) Save the file wherever you want, like on your desktop.
@echo offsetlocal set steamID=555555555set steamFolder="Y:\Steam"del "%steamFolder%\userdata\%steamID%\22380\remote\*.fos"del "%steamFolder%\userdata\%steamID%\22380\remote\*.ini""%steamFolder%\steamapps\common\fallout new vegas\FalloutNV.exe"