unset TCL_LIBRARY and TK_LIBRARY

[Wolfman]

Hello- was hoping someone could give me a hand in permanently setting
my TCL_LIBRARY and TK_LIBRARY.

I downloaded Python2.6 to a ThinkPad that came installed with
Python2.2, and I can not run IDLE as something automatically sets
TCL_LIBRARY and TK_LIBRARY to C:\IBMTools\Python22\ each time i open a
new command line window or reboot the machine.

i have set them to the appropriate Python26 sub-directory via command
line and IDLE opens just fine and dandy, but as soon as I close the
command window or reboot computer it sets them back to the
aforementioned C:\IBMTools\Python22 subdirectory

how can i permanently SET TCL_LIBRARY and TK_LIBRARY?

thanks