The script is na easy way to re-allocate your TempDb. It builds several T-SQL statements, depending on which parameter you've added. At least one new file location should be specified. The parameters regarding filesize, max filesize and growth steps are optional.If specified, these values are being used for every datafile.
If you specify 'Y' for the parameter @debug, no action is taken. Instead the commands are presented.
If you've specified the max filesize, this script also displays the maximum diskspace being used by Tempdb. This is a basic calculation for each filetype so you'll have to review these numbers by yourself.
The script does not check the number of datafiles compared to the nuber of CPUs