USB-UIRT, Sage, and Scientific Atlanta 4200HD

I have everything working using a 4200HD.ir that someone posted (thanks!) but it only has the numbers 0-9 and I would love to be able to use the ENTER key to get rid of my channel surfing issues.
On the 4200HD I can enter digits at 0 msec delay - but if you hit channel up multiple times - without the enter - I end up getting channel changing issues with mixed numbers.
I have tried learning via my USB-UIRT at anywhere from 0inches to 20 feet and can only get the occasional blink from the LED during a learn phase (56K issue).
Is there a repository anywhere of working .IR files or discretes? I really just need to add the ENTER key.
thanks!
On the 4200HD I can enter digits at 0 msec delay - but if you hit channel up multiple times - without the enter - I end up getting channel changing issues with mixed numbers.
I have tried learning via my USB-UIRT at anywhere from 0inches to 20 feet and can only get the occasional blink from the LED during a learn phase (56K issue).
Is there a repository anywhere of working .IR files or discretes? I really just need to add the ENTER key.
thanks!