managed to sort the nfs out, devilfish pointed me to a general FAQ, it was there all along, i was for some reason making it harder than it needed to be, it ended up being really easy to set up :-|
I'm stuck on how mythtv talks to the dbox2, i thought i was onto something but it's not worked as of yet.
Using a sportster 1.7 image as my normal image but i have been playing with some of the newer images, commando etc...
cheers