Installation Cleanup

I tried to upgrade to 5.1.2 this week and it hung while migrating WDSC
settings (I waited a few hours). Next, I uninstalled 5.1.0.3 (selected
both WDSC and WDS) and reinstalled. After the install I noticed that I
still had a WDS directory where 5.1.0.3 used to be installed with about
64M of stuff. I renamed that because the new install went to Program
Files\IBM\WebSphere Studio (without asking). Everything seemed to work
OK so I started looking a little more to see if there were any more old
files and I came across a bunch of stuff in
WDSC\iseries\eclipse\features & plugins. 

I decided to uninstall, cleanup, reinstall, but I only have an option
to uninstall WDS, which makes me nervous. Is that all I need or should I
also have a WDSc uninstall?

I also noticed that the install put at least five JVM's/JRE's on my
system -- in IBM\KCL\_jvm, IBM\WebSphere Studio\Site
Developer\V5.1.2\_jvm, IBM\WebSphere Studio\Site
Developer\V5.1.2\eclipse\jre, WDSC\_jvm, WDSC\sdk, and
WDSC\iseries\InfoCenter\eclipse\jre. Is all of this really necessary? My
main hope with this release was that it would run with a 1.4 JDK so that
I could use some plugins that use the cryptographic extensions without
having to go through the trial and error process of changing the JRE. As
shipped, it is using a 1.3.1 JRE. 

Thanks,

David Morris