Hmm, I can't quite remember, but how is the inter-code spacing on the RC9500? There used to be a trick on the original Pronto where you could extend a code using the original code followed by numerous repeats of a "partial" code. This didn't work on the Pronto NG because it put about a 0.4 second space between each code, but the spacing improved on later firmware and the color models. And depending on the device it MIGHT ignore any remaing delay... might not hurt to try. Check the original Pronto FAQ for this one.