Even though hplip worked for me, I used your driver in preference - I like what you are doing. Am new to Lx, and the explanation on your page http://foo2xqx.rkkda.com/
took me quite a while to get my head around. In fact it took me a bit to realize that I had 2 choices: either install via hplip or install via the procedures on your page. the real problem was that I had no 'context' for this issue.
A small donation by way of thanks. Made by google checkout - the 1st time I have tried it so let me know if it does not work.