it seems that i should forward here my letter from Haskell Platform list: i just installed Windows Haskell Platform RC. it have created "Start Menu\Haskell Platform\GHC 6.10.2" item, that forced me to think deeper about HP universe yes, we decided that HP will include up-to-date GHC and some set of libraries. but how different HP versions will coexist? one model is that every HP is separate universe, with its own GHC and libs carried - this case menu item (and disk directory) should be called something like "Start Menu\Haskell Platform\2009.0.0" another model is that each HP release updates HP universe already existing on user's box. i.e. it comes with some versions of GHC and libs while this universe may already contain this and previous GHC versions and some libraries so HP should be carefully installed in order to not lose old contents (such as ghc-pkg database) i fear that currently this topic was not considered and we don't support any model at all. i.e. every next HP release will just overwrite universe with fresh GHC installation making it suitable only for beginners well, the good news is that we can make a *first* release that does clean installation and add "update" feature only staring from the second one (well, as far as users will not install first release attop of later ones :) -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com