Yes, you can do this MediaLab v2008. You can create HTML pages and call them up as custom items in your questionnaire. When doing so, you can insert variable names in the HTML file itself--just like you would if you were inserting variables from your responses.xls file into the question wording of a regular MediaLab item, e.g., <myvariable_01> etc.

DirectRT can not use a responses.xls file yet--but we are working on something like that for the next version.