I'm interested in this question too. I've just bought an ASUS RT N16 and flashed with dd wrt to make a repeater bridge. Now I'd like to run my time machine back ups and set up a wireless print server in my network but don't know where to begin.
There are heaps of forums, but there are also so many builds and additions to dd wrt, its impossible to know what information is up to date. Often you see someone write some kind of code to fix something, but you'd assume that these fixes get adopted in later builds of dd wrt.
If anyone has succeeded in what the OP is asking, It'd be great if you could provide a reference for a current and proven solution.