Help with command line usage and parameters

Rhino

Can anyone please direct me to any documentation, or explain to me, how to pass a variable from the command line to a parameter within a crystal report? I have tried searching, and although I have found relevant results, I have not yet gotten it to work.
It should be noted that everything else is working spot on. I'm extremely pleased with the robustness of the software. If I specify default values within the reports everything exports and works very cleanly. My only problem is that I would like the ability to specify these values at runtime to make scripted reporting much easier.

In addition, is there any documentation showing what switches/arguments can be used on the command line?

Thanks in advance!