I assume you mean the webtools project?
http://www.eclipse.org/webtools/
Make sure you also install the plugins it depends on such as emf, gef, and VE.
Also I noticed you were installing manually as root in /usr/share/eclipse, this is generally a bad idea
It's probably best to install it locally as a normal user using the eclipse update manager
http://download.eclipse.org/webtools/updates/
There are plans for a webtools rpm for FC5 but it's still in development.