No, but your question implies to me that it's difficult. That means time-consuming. That means costly. That means the client is likely to not want to have to invest in another remote, not even a better one like the 890.

That's why I made my comment. Could you give us more context to your question so I can be sure I've interpreted it correctly?

Oh, and... is the 880 one of those remotes whose programming can be loaded into a different model remote, hoping in this case you could load it into an 890?