Carl,
Once again, the pronto TSU6000 won't work because you can NOT address the IR flashers individually. Rives audio and I have both given you the same answer, yet I guess you have your mind set on the pronto. I have programmed the pronto in the past and I'm sure sure Rives audio has had experience with them.
Don't take our word for it. Go out and spend the $1200 for the unit and pay the $600-$1000 to have it professionally programmed. And, when it doesn't solve your problem, send me an email so I can give you a "I told you". Sorry to get rough, but it doesn't look like your paying attention.
The cheapest remote that I know of that lets you address IR flashers is the Crestron ST1550C. The last I checked the the suggested retail price was around $4000 with the ST-CP control processor, which has 4 addressable IR ports. Add in $1200-2000 for custom programming and it would be cheaper to buy another player. How about the Linn Unidisk?