Using Tkniter in ArcToolbox

If you download this script: http://resources.arcgis.com/gallery/file/geoprocessing/details?entryID=C2594BA8-1422-2418-A048-74E477699334 from the resource center and want to call it from a toolbox, you can do the following:

1. Open ArcCatalog
2. Create a new toolbox (something.tbx)
3. Create a new script
4. Point to the file from the download
5. Uncheck both "Show command window when executing" and "Run python script in process"
6. Press finish

Now the GUI form will show.  

(Note, I didn't write that script, but I'm using it as an example of showing a GUI form from ArcToolbox.  If you have issues with the code, please contact the developer of the script.)

Enjoy