I have done this on several occasions. I use the channel number for the channel ID and it works fine. It does not get the lineup info, but that's to be expected.

I believe the channel ID numbers are just unique identifiers for each itel within your profile. I can't be sure but I beleive there is not real use for them.

As for the +200 thing, have you tried updating your tuner ( tv, cable box, ... ) IR language for your actual +100 button? Mabye it just has it wrong.