Actually Tk isn't a single module, There's more like 80 modules. Between
the modules, autofiles, and documentation, the version of Tk than I have
loaded takes up about 5Meg of space. The newest version is probably a
little bigger than that.
I'm not exactly sure how PPM handles its downloads,
You are probably only looking at the 'site/lib/Tk' directory, there is also
the 'site/lib/auto/Tk' and 'html/lib/site/Tk' directories. I don't know how
much space v800.022 takes up for all this, but 800.015 is just over 5Meg.
Also, as Jan described, PPM downloads the .tar.gz file, decompresses
