You can download the .cml files for all the Lexicon processors from http://www.theatercontrols.com

These are in the native T2 format, so you don't have to convert anything.

The reason you can't learn the REC/ZONE 2 key (or the shift key either) is because these keys do not have a signal of their own--they modify the signals sent by the other keys.

When you download those Lexicon libraries, you'll see that all the Zone 2 functions have their own codes, which are equivalent to holding down the REC/ZONE2 and hitting the appropriate buttons.

Hope this helps,
Philip Brandes