what you have to do is to call your reports.exe from your main.exe with the name of the report you want to run like this

do reports.exe with "mySpecificeport.frx"

then, in the reports.exe project you have to make a program and set it to main program wich recieves the report name as parameter something like this

*:Main program of reports.exe project
LParameter lcSentReportName

if !empty(lcSentReportName) then 
   *:run the report
   report form &lcSentReportName
endif
return