When I downloaded the file, and unzipped the programs. I click LFS and it says A required .DLL file, DINPUT8.DLL, was not found.
What should I do?

Err, do you have DirectX installed? Latest version is 9.0c.

That is a system DLL file and is part of directX I would get yourself over to MS and check for updates , thats assuming your running a flavour of windows.

SD.

Edit: Must not leave threads open like this for 5 minutes before posting... :S