Installation shouldn't be too hard. The instructions say that it only runs on top of mzscheme-372, but I've heard that 3.1 runs on top of the latest versions of plt. I haven't tested that, however.

Would you know of another less painful, very minimalist, web oriented lisp dialect?

Unfortunately, no. As much of a joy as it is to program in Arc Lisp, development of the official branch seems dead and I have some doubts about anarki's stability.