In truth is was more than just a couple hours. Most of the work for parsing the files was already done in a previous class I created. I'm not so good with Tk/Tcl so it takes me a while to do the user interface. Which by the way has a flaw in the file save. I force the extension to be .pz2 (after the file save as dialog), so be careful. It would be best if you specify the .pz2 in the dialog. I'll fix this (add a warning) after I get some feed back.