I was extremely frustrated by this at one point; I found the solution on another message board (I forget which one).
It turns out that there is a bug in XP; the way to get the OK button to enable is to browse to the executable you want to map using the browse button, fill in the rest of the mapping dialog <workaround> and then click on the 'Executable' text box again. Giving that text box the focus seems to do the trick </workaround>. Hope that helps.... -John You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.