Parameterize Vugen Script to work for 2 different URLs

Hi, 

I have a Vugen script that needs to run for 2 different URLs at different times. Those 2 URLs are basically different environments. I want to parameterize the environment with those URLs. I am planning to do it the data file giving 2 URLs and give the variable name in the script, but I would like to know if there is any better logic to it or the code. 

Thanks,