I first tried installing the IDE plugin into RAD since that's what I already had installed.  For some reason, it couldn't actually open the perspective.

Then downloaded and unpacked the Eclipse 3.5.2 package.  I added the Force site to Eclipse and it started the plugin install.  However, about halfway through it failed with a repeated error:  "unpack facility not configured" for every package.  Running on XP.   Any suggestions?

George