Sounds like you're half-way there. If you've registered the executable (and therein specified that the thing is a pl/sql package) and you've created a concurrent program that uses that executable (and therein specified any parameters to be supplied at runtime etc) then all you need to do after that is register the concurrent program with an appropriate request group. eg the standard one is 'UK HRMS Reports and Processes' - you might want to add it to that one or alternatively if you want access to it to be restricted in some way then you'll need to create a separate request group then a specific responsibility to make use of that request group. Thereafter you should be able to run it.
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