The easiest way to get a copy of tklib is to pick up one of the Batteries Included distributions that include it, the most popular being ActiveTcl. You can also download the package directly from http://sourceforge.net/project/showfiles.php?group_id=12883&package_id=168684
Or, you can download the cvs snapshot of tcllib from ftp://tcl.activestate.com/pub/tcl/nightly-cvs/
Tklib is also available via CVS from http://tcllib.sf.net/ and its CVS repository [L1 ] [someone needs to insert the specific cvs steps here].
Or perhaps see if you can locate a tklib starkit .
After you have have the source, then use the appropriate command to extract the directory structure from the archive file.
At this point, the extension is treated similarly to any of the TEA script based extensions.
$ cd tklib-{directory}
$ ./configure --various --flags --as --appropriate
$ make all test install