Changing the Account an ECMA 2 runs under

Is there a quick and easy way to change the account an ECMA 2 is using - even for specific tasks? My need is that I have developed the ECMA in a Dev domain but need to copy a file to a production share before we move the ECMA into the Production FIM instance. My Dev account doesn't exist in the production domain so can't be given the permissions. 

Cheers,

Dave