Global/Config variables in Analytics drill url

I am looking for a way to use configured or global variables in an analytics drilldown url , for example like pentahoBasUrl can be use in reporting. I really have not seen anything on doing this, plenty on doing it in reports, including:

http://www.on-reporting.com/blog/env...w-to-use-them/

and

http://wiki.pentaho.com/display/Reporting/DrillLinking

Anybody know a way of passing in a base url so I don't have rewrite 32 reports for every environment in my SDLC.