please use the newest version of the simulator to be found here:
This version is from today, so pretty new. Most of the changes were made in September and June 2013.
You find the newest versions always under http://www.peerfact.org
SCRIBE is not yet implemented but it should not be too difficult to implement on PASTRY. Pastry is already implemented, so make yourself first familiar with it. Run some simulations and be sure to know how to obtain your results.
As a step after that, you can have a look how PAST is implemented as replication module on top of PASTRY or how the file sharing application uses PASTRY.
Good luck, its well doable