HKMe:
The reason Media Center can't change channels is because using the MCE device requires exclusive access. IR Server Suite has taken that access and won't share it
The only way to support Media Center properly will be to handle the channel changing for it. Without looking into that side of things yet I can't say if that will be easy or not. But I doubt it would be difficult.
I'll be investigating this plugin a little more during the week, so hopefully by the weekend I will know more.
Thanks for your interest,
Cheers,