Sorry, but I did not understand you well...
Setting plugin parameters can be made in the same way you "encode" data, just passing "flagParams" and a pointer to plugin information. Currently, VTDbTool supplied with Asphyre does not support setting parameters but I'll try to make an example for this in the next release... things got slow now because I'm graduating and have thousand things to do which left me almost no time for development. Hopefully, this will be over soon....