There is a UEI code for the OPPO 970HD, but last I heard it was not included in the version of the UEI database loaded onto the Outlaw remotes (Model 990 and Model 970/1070). I don't know about the Vizio and Olevia TV's.

You might consider picking up something like an MX-500 for not too much money. A good universal (especially one with learning at least some macro capability) can be a huge help in operating a home theater setup.