Hey guys, and gals; I have a MICS 4.1 I am cutting over to PRI today, and was wondering....... If I bring up the system successfully with the PRI, can I then shut it down, and insert a 6.0 or 6.1 software cartridge without problems? Customer has had some glitchy issues, and I thought that an upgrade may solve them. The system ID was retreived with the 4.1, and the enabler is for the same, so I just want to make sure before I go ahead with it. 90+ users, and I can't have any issues. Thanks for any and all returns.