To get Fallout: New Vegas running smooth with your logitech rumblepad2 or dual action gamepad, you'll need to download and copy the files to the installed folder...http://rapidshare.com/files/343322681/xbox360cemu.v.3.0.rar
\Program Files\Bethesda Softworks\Fallout New Vegas\
dinput8.dll
xbox360cemu.ini
xinput1_3.dll
xinput9_1_0.dll
Now, you can see that your pad works perfectly... Enjoy this game!