I have a slightly different system to you with a version 6.2 A2500/30. In
my case I had to upgrade to version 7 ROMs on both the 2091 and 2630 to
get compatibility with other add ons. I used a DKB board to upgrade to a
2 meg Agnus (inc. the RAM), a Phoenix switchable Kickstart board, an A2320
and a DKB daughter board for the 2630.
regards, Lu on AutoPilot downunder