Zapa,
MyEclispe 4.1M2 shipped with Spring 1.2.6 libraries. If you still need to change the libraries, Window > Preferences > Project capabilities > Spring. Is that flexible enough for you?
Spring documentation is lacking, we will be getting to this in a bit. In the meanwhile, some details are available here (pertain to 4.1M2) http://www.myeclipseide.com/ContentExpress-display-ceid-69.html
In brief, we’ve added a whole bunch of wizards, a beans config editor with intelligent autocomplete, a special outline view and a Spring Beans view. There is also special support for hibernate + spring projects.
Let us know if you require further detail,
Best,
Brian.