Don't worry! It's only stuff...

# run eclipse as root
sudo /usr/lib/eclipse/eclipse
 
# install GWT plugin
Help > Install New Software
Work with: http://dl.google.com/eclipse/plugin/3.7
Add
OK
Select:
Google Plugin for Eclipse (required)
GWT Designer for GPE (recommended)
SDKs
Next >
 
# GWT Designer
Help > Install New Software
Work with: http://dl.google.com/eclipse/inst/d2gwt/latest/3.7
 
# beta
https://developers.google.com/web-toolkit/tools/download-gwtdesigner-beta
...
 
# Links
http://code.google.com/intl/de-DE/eclipse/
http://code.google.com/intl/de-DE/eclipse/docs/install-eclipse-3.6.html
http://code.google.com/intl/de-DE/webtoolkit/tools/gwtdesigner/tutorials/loginmanager.html
http://www.mail-archive.com/google-web-toolkit@googlegroups.com/msg64952.html