[VoiceOps] SLA and yealink

Hi guys On Broadworks, there are 8 users in a group and they all have Yealink T26P. There is a requirement all 8 users should be able to pickup call for other 7 users using individual buttons. But this Yealink phone has only 3 lines but have 10 memory keys, is there a way we can tweak and use memory keys for registration and use SLA with these keys for every other 7 users? If i want to use BLF, how can i configure multiple list URIs on a single user? Because i want individual buttons to monitor every other user. the only possible way i see is monitor all 7 other users on a single BLF uri and create a BLF List uri for every user to monitor other users? What do you think? Hope all of this makes sense :o) cheers! -- Rakesh