We are transferring from Keystone I to Keystone II. We use CCS 6.1 and MCSDK 3 to support Keystone II. During the past, maintain two version of CCS on one computer has given us problem. We also know we should not have two version of MCSDK inside one CCS. Our idea is that using Keystone II with MCSDK 3 to support both old Keystone I code and new Keystone II code. Could this goal reachable?