Looking for best way to pass Transform Stream Fields into a Commd line arguement?

All -

I want to execute a simple command line for every row (Windows). I have Excel Input step and I want to run the following command for fields in stream:

mposter -b "Priority=<Priority_Field>;StatusModel=<StatusModel_Field>;Category=<Category_Field>;Company=<Company_Field>.."

What is the best way to do this? I have looked at using Execute a Process step, but how can I pass in a large number of fields? Can someone share a simple script that I re-use as an example?

Thanks in advance!

KP