I guess this might be the easiest way to do it; I do it the hard way since I am running ethernet without any roaming, and don't really need NM. Works for me, but again, ymmv, especially since you are running pppoe so I don't know the effects. More research needed or maybe someone can jump in...
I'd check and see if you are using DMA for those drives. I forgot where to check though.Music players now recognise my firewire CD player and display cover details & contents but freeze immediately on pressing play.