Hi Ismael, Chris,
I created p2 repository/update site some time ago using command like below.
So to run the command I use Eclipse SDK 3.7.2 to extract the p2 repository from the EPF installation location. Next I installed Eclipse Modeling Tools, the Helios release. Eclipse Modeling Tools does have p2/equinox so then you can add EPF using the regular install new software option. From there you point to the p2 repository and you have EPF running in Eclipse Modeling Tools. Then - of course - you can install anything else you need, Subversion, Git integration and so forth.
IMHO it would be better to distribute EPF as a p2 repository/update site.
If you are interested in using such update site, please let me know, I will see if I can host it somewhere.
java -jar F:/Download/eclipse-SDK-3.7.2-win32/plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar -application org.eclipse.equinox.p2.publisher.ProductAction -metadataRepository file:/F:/Download/epf-p2-repos -artifactRepository file:/F:/Download/epf-p2-repos -source "F:\epf-composer" -configs=win32,win32,x86 -compress -publishArtifacts