You have experience with [Tcl]--certainly you're beyond the "[When all you want is to run a Tk
application]" level.  Someone hands you a '''.kit''' file; what do you do with it?

Experienced [Tcl'ers] know to run it against [Tclkit], that is, invoke
    tclkit some_application.kit
As Tclkit is an important idea, perhaps you'll want to learn it, or at least enough about it
to download the executable and launch the application that interests you.  If not, perhaps you
can find someone with more experience to "unpack" some_application.kit for you and forward the
*.tcl sources (and perhaps other texts and binaries) it packages.  At this level, you see, Tclkit
is a way to wrap up an application into a single file; it can equally easily be unwrapped into 
pieces that might be more comprehensible to a newcomer to [Tclkit].