There is a saying I think about every time I see something like that, "you get what you pay for".

Interfacing with computers with a remote has always been troublesome to say the least, one of the downfalls of the media center PCs.

Do you currently have an IR interface for your computer? If not, you will need to get one.

Look into remotes from URC, they have a wide selection of quality remotes. However, if your price range is near what you linked to, then you are just SOL.