I read it's possible to use plugins in PanotourPro (I'm using 1.8).
Where can I find them and how does it work?
I'd like to tweak my standard tours a little: http://www.fotografie360.nl
If you mean third party krpano plugins then you'll find them here:http://krpano.com/plugins/
You may be able to incorporate some of them by ediitng the XML files created by PTP 1.8.
But be aware that changes made to PTP's XML files will be overwritten on every Build.
Of course PTP 2.x has many more features available as standard.