Considering Interface Builder nearly didn't change between the
version in XCode Tools 1.x and 2.x, these instructions
shouldn't be outdated.
I do not remember exactly how a Framwork was added in XCode 1.x,
but i believe this was with the same command,
in the project's 'Groups & Files' Tree, right (or ctrl -) click
anywhere to pop open the menu, choose Add > Existing Frameworks...
Then browse to the webkit you'd like your app to be linked to.
There was a separate "Add Frameworks..." menu command in one of the
main menus. You now simply use the "Add Files..." menu command
instead. But yeah, the contextual menu contains a separate "Add
existing Framework" command instead.