Reading all your posts I was not sure, but does your TV have the normal cable input (RF) and one set of RCA inputs?

Also does your DVD player have an RF input and output?

If both of these are true then you can get a cable spiltter from Best Buy. Run one cable to your TiVo and now you can conect the TiVo your TV with the RCA's. Now connect the other cable to your DVD RF in and connect the RF out to your TV RF in. Now you can use your TV's remote to change inputs on the TV, or maybe if your lucky the new TiVo remote can change in the inputs on your TV.