One way would be to write a small script that copies the programs from one channel to another.
This SQL should almost do it (ie try it, I've not tested it):-
I've not tested this but it should work.
chanid = 'OLDCHANNEL'
Note the fields in '' need to be replaced with the correct values:-
NewChannel - Channel number that should contain the new program list
OLDCHANNEL - Channel number that contains the programs you want to copy
listingsource - Video Input number for the newchannels
Edit: Just tested the SQL query in myPHP and it worked