I'm sorry but if I were trying to learn spring and hibernate for a job in 7 days, I wouldn't mess around with the plugin, and go straight to learning spring+hibernate. In 7 days you will probably understand how to use the plugin, but if your potential employer doesn't use the plugin, you are screwed.
We have been using spring hibernate in a team of 20+ people for 2 years, and none of them uses the plugin. We have specified dependencies to spring and hibernate in our
maven build, and we just have m2eclipse. Never used the spring plugin.
I think if you are just trying to learn, the best thing is to download the spring and hibernate jars, add them to your class path and start trying out some samples. You are probably being very aggressive in trying to learn in 7 days, unless you have some prior expertise in IOC, AoP and ORM already.