As a side-note, this looks interesting (Googled up by Egon), a Prolog Eclipse Plugin:
Could be interesting to combine that, in the future, with the results of my current project. Worth thinking about at least.
Since you are interested in an Eclipse's IDE for Prolog then I recomend you to take a look at ProDT. It support as underlying interpreters: SWI-prolog, XSB prolog, B-prolog
The site has more information about the project including installation and features list: http://prodevtools.sourceforge.net/
Hope you can find it useful!!! :)
Looks interesting indeed, will check it out asap! Thanks! :)