STS and Grails installation source attachments

Hi!
I've been working for some time with sts and it's great grails support. I use maven and its eclipse integration for quite some time and one thing i love it's the download sources functionality and the automatic source attachment. I was wondering if this kind of support is possible when specifying a grails installation. I've seen that sts already downloads all the dependencies and places them in the ivy cache, but this doesn't happen with the sources. I tried the grails eclipse plugin which downloads sources and javadocs and places them in a separate directory in the cache. The problem is that i have to link the sources manually for each case in particular. Creating the eclipse files with this plugin is not an option because it removes the project facets and specific grails configurations. If anyone knows how to deal with this i'll be very grateful.

Regards
Emiliano