1.  Set up the parameters in the main report.  If the main report uses a command instead of tables, you'll need to set them up in the Command Editor, not in the report itself.

Whenever I set up my parameters in the command editor and click 'OK' to accept my changes, they disappear from the Parameter List upon re-entering the command editor.

I've made some changes to my initial plan of attack:
-No longer calling stored procedure. The report and sub reports all have their own commands; each command declares my two parameters.

Despite my parameters disappearing from the parameter list I think I've successfully linked up the parameters for each report. Upon execution of report ( or at least a print preview) I'm only prompted for  each parameter once - which is an improvement from what else I've experienced. However, I'm not retrieving any records to populate my report, only getting a blank report.

OK. Switched back to stored procedures for all of my report/subreports (hopefully for the last time) and all my parameters are "staying" in the CMD editor, as well as linked to each other. Upon previewing my report all results seem to show/seem correct. However, when I attempt to run report through Crystal reports exporter I receive error this error:
           "Error in File myReportFile.rpt: Operation illegal on linked parameter."
Each report uses the same 2 parameters. When passing parameters to report from command prompt I only send the 2 parameters once, but the prompt indicates that it's sending these values to the parameters for each report.

Any help would be greatly appreciated.

Figured it out!

Crystal reports exporter is for converting your CR to a different format (in my case .pdf) - http://www.rainforestnet.com/crystal-reports-exporter/

But back to my solution - I deleted all of my subreport  links and it worked perfectly. For some reason with Crystal Reports Exporter all I needed to do was pass my parameter values once for each parameter (Not sure why I only had to pass it once, but they are all named the same?) and the values were sent to the parameters for every report/sub report.

Thanks for your help hilfy.