multiple versions of ghc

Is it true that on unix, tools like ghc-pkg-6.2.2 and ghc-pkg-6.4 may co-exist, but on Windows the version number is not present, so a single executable is simply called ghc-pkg.exe? If so, how do Windows users deal with having more than one version of ghc installed simultaneously? Is this just a bug/oversight that can be fixed? Regards, Malcolm