extra libraries vs. cabal libraries (ghc-6.10.1)

Hi, the documentation of extra libraries is listed under share/doc/ghc/libraries/ 1. Is it possible to add cabal packages in the same way? How? 2. It would be nice if the cabal-install (i.e. the binary cabal) came with ghc. Currently zlib, HTTP and cabal-install have to be (awkwardly) installed via Setup before being able to "cabal install". Cheers Christian