from looking at the script an macro this should work, if '1' is your master-key and you want to use '2' as the slave key.
(so the /assist [mod...]-macro would be bound here on 2, and you are only pressing '1', and rox is the char in wow1 and box the char in wow2).
One simple thing qhy this often is not working is, that you have anything else bound to ctl+2,shif+2 or alt+2.