>Is there any FRX hacker primer out there on the web? Something that would list the FRX fields and their effect on the output? Say for example, how many different object types and their descriptions (objtype field in FRX structure). Am I asking for too much? (Ok, don't answer that last one..)

There was a pretty good article in th FoxPro Advisor.
April 1999 Issue. The article was "Report Forms: The Inside Story" by Jefferey Donnici. I found it interesting and might have exactly what you are looking for...