While I was doing weird test with bidule I did the following:
In SFP:
Get a project with 2 ASIO IN and 2 ASIO OUT free
Insert an externalmasterFX device and connect its internal connections to ASIO INs and OUTs
connect its inputs to a synth (Minimax,...) and its outputs to your mixer
In bidule (or other VST hosts)
connect the related creamware ASIO IN and outs to your FX (in my case CSR Hall

Play!
cheers
Michel