I had something interesting happen today to alleviate my boredom. I had a part open in SW and using TOOLS/SWExplorer I did a where used on the part. Then I opened 2005 for a second to see if I was on SP1 or SP0. Finally, back in SW Explorer (opened from 2004) I tried to open one of the files that SWExplorer had found. It insisted on opening in 2005. I shut down SWExplorer and SW2004 and restarted 2004. Then everything behaved normally. Apparently when you have both 2004 and 2005 open it can confuse SWExplorer as far as which release to open a part in.