Windows 7 MC Remote Direct OTA Channel Entry

I have two HTPC's.

One Dell Studio running Vista
One Dell Vostro running Windows 7

I'm trying to figure out a way to manually enter the "." in the channel number on my Harmony 880 remote. I have a couple of Dell media center remotes, but neither have the button to learn the command.

With Vista this wasn't an issue because they gave the channels 4 digit numbers. Now with '7' they use the true number in a 7.1 fashion.

Any ideas? Enter the numbers doesn't do much good when it won't change channels

Dell Vostro 220s
E5200 Processor
4GB RAM
ATI 3450 Video Card
AverMedia DUET TV tuner
Harmony 880 Remote
Windows 7 Professional

Thanks, I'll have to dig up my newer media center remote as the one I found must have come with Windows XP MCE as it has no "*" key