Hi Nick,
Your basic construct here is sound. You've got the proper contexts set up, and just need to add some keywords. Take a look at the modifications I've made to the attached - I added in $Name to display your test scenario name(s) for each use case, and filled in some sample keywords for your custom fields. You should be able to use any of the custom fields you have defined for test scenarios as keywords, just make sure to include the keyword indicator ($) with them, and remove any spaces when using them in your report template.