Shorty,
It is not quite clear what you are after, the subject states convert
template, the body of your message says something else.
If you use PPT 2003 and you want to transform your ppt to a pps, the easiest
thing to do is to simply rename the file with Windows Explorer from *.ppt to
*.pps.
If you have PPT 2007 on the other hand, you will have to open your
presentation and use save as to save it as a ppsx file. Renaming will not
work.
If you mean something totally different, post back.