I have a production server running SQL Server 2005 Enterprise Edition that has been patched up to SP3.
I had this problem in the past but never found the workaround, or I wasn't brave enough to go ahead and try it. I understand that I could do this on a test box and see what happens but I wanted to see if anyone had done this before and might save me the effort.
I need to put a second instance of SQL Server 2005 that will be a named instance. As it's going through the System Configuration Check I get the infamous "Edition Change Check (Warning) : To change an existing instance of Microsoft SQL Server 2005 to a different edition of SQL Server 2005, you must run SQL Server 2005 Setup from the command prompt and include the SKUUPGRADE=1 parameter.".
I bypassed that and went ahead with the install. I'm pretty sure that there was just a check that found a different SQL Version and it assumed you were doing something with it instead of adding a new instance.
I just wanted to see if anyone knew of any issues and that I did things properly.