It's not the pulling out that's the problem, i know how to do that but it's the filling of the bucket that doesn't work (the deployer won't do anything with the bucket).
Edit: I was thinking of putting a RedPower pump and put the lava on the ground and then get the lava from the ground with a deployer. But how would i get blutricity down into the nether? I'm not really used to RedPower yet.