Thanks a lot! I will try that.
In the meantime I found a (very unelegant!) solution:

I compile the source code in the PBP compiler.
After that I start my 'good old' Epic Parallel programmer and load the hex-file.
I can change the configuration settings in the Epic software and save the hex-file again.
After that, I program the (modified) hex-file with the PicKit2 programmer. (Because of the lower programming voltage.)
This works... But not a very nice solution!