ISG Simvionics has a mod for the Avro for using their gauges and FMS in the AVRO. I was wondering if anyone here figured out a mod for the Bae 146 to use their gauges in that aircraft as well. It is pretty slick in the AVRO, and allows you to input a flightplan in an FMS, and has a modified HSI to work with it.
Maybe it helps. Otherwise I recommend to post your request or question in Ernie's forum http://fsbuild.com/forum/index.php?c=3 I think a completed config file would also be interesting for Ernie's download site.