scenario

i have a conference / voice personals dating line that has a list of conferences . in this case they are labeled

conference room 1

conference room 2

conference room 3

etc

users select dtmf 1-19 from a conference menu and get put into the conference room. i want to setup options for them to move forward and backward through this list but since the conf module profile binds digits to every conference i currently would have to setup up a separate profile for each conference room in order for me to make bind digit 7 move forward in the list to the "next room" or 6 to go to "previous" room number . ie. is there a variable that would take the room im in say and make dtmf 6 mean transfer me to room 1 backwards 1 getting me to room 19 without going back to conference menu and pressing 7 moves me forward in the list numerically without having to go back to conference menu and choosing a new dtmf

press 7 from room 1, you go to room 2

press  7 from room 2, you go to room 3, etc 

press 6 from room 1 , you go to 19

press 6 from room 9 , you go to 8

but if i only have 1 profile "default" i can only use that bind digit to move to a static conference in the ivr.

please tell me that i am missing the understanding  and there is an easy way to do this with one conference profile. thank you