If you have STS installed, when you right click on the project you should see a Spring entry on the context menu. You can then add the Spring nature to the project, which provides UI for things like the beans explorer in the project explorer view.
Once the project has the Spring nature, you should be easily able to create new beans definition files, which will use the editor geared towards editing those files.
If you don't have STS installed check http://blog.springsource.com/2009/08/06/springsource-tool-suite-210-now-available/ here for details of installing it by download or update site.
Not sure if this is what you're looking for.