Hi Dave,
I'm a little confused as I'm not a Linux geek myself!
I working with Windows from early 90's, but find that project
pretty interesting as it works on a very low hardware!
So I've take an "open" router and installed all needed files
and all worked fine. But I think that PI use a pretty "low"
Linux distribution and you probably need to add some package
to be at the same level. That is why I refered you to slothbag's site.
Then, PI is not the trouble as it is "stronger" then my 525Mhz, 128Mg router!
Hope you'll find the right "recipice"
Regards,
Jacques