you can do what you want via Remote Buddy's AppleScript interface:

1) In the BCK, create two actions - one for activation, one for 
deactivation

2) In these actions, make use of the behaviourcore command with the 
respective code to "sticky" activate the Behaviour and return to the 
auto-selection respectively. Sample code to be found in the 
AppleScript dictionary in Script Editor and - if you need to get a 
list of available unique identifiers - in the Remote Buddy FAQ.

Best regards, 
Felix Schwarz