You're right... fredo's joinpushpull does something very similar to what I wanted (I didn't know until now)
Thanks allot!!!

I was wondering if there is a script/plugin that could push/pull a grouped object's face without entering the group/component..
If I'm working with a number of wood beams, each one grouped, and I want to adjust the length of one or another I have to enter the group each time and use the classic push pull tool..
I'm not a programmer but I don't see why this couldn't be done without the need to double click the grouped wood beam and pull...