1. Ask your browser of choice to get these files from the [1]Tk/Tcl project:

http://prdownloads.sourceforge.net/tcl/tcl-8.3.2-1.i386.rpm?download http://prdownloads.sourceforge.net/tcl/tk-8.3.2-1.i386.rpm?download

2. Install them by issuing the following command (as root):

# rpm -i {tcl,tk}-8.3.2-1.i386.rpm

3. At this point, I am a bit unsure whether or not the libraries are correctly named, but have a go at (still as root):

# ldconfig

And then try to run freesurfer the way you usually do.

[1]: These files are directly from the tcl development site at tcl.sf.net.
2005-Feb-03 1:21pm kteich