How do you create a dynamic table that allows the user to add rows as required?

With WebMaker 3.1 you should be able to use the 'Editable Row' control to easily provide this functionality. For more details, please see How do I use the Editable Row control?

If this is unsuitable for any reason, then please look through the following video. This will provide a set of instructions on an alternative way to achieve this functionality:

http://www.hyfinity.net/hintsandtips/AddingEntriesToRepeatingTables.htm

After you click the link, there will be a control panel at the bottom that you can use to pause and replay the information.