Processing Rule Editor question

Hi Everyone,

Hopefully I didn't miss a solution to this problem when I was searching the forums. Anyways I was wondering how I can create some sort of regular expression in the Processing Rule Editor's "Message Name" field to catch and categorize all messages with the same prefix in their name.

For example, all of my test messages have some prefix followed by the date and time of their entry into the system as their Message Names to uniquely identify them. Let's say I'd like all my messages prefixed with "MSG" to be categorized by some rule. When creating the rule I would expect to be able to place a regular expression such as "MSG*" in the "Message Name" field in order to have the rule catch all messages who's name starts with "MSG" and categorize them but this is not the case.

If anyone knows how to do this could you please help me with the expression's syntax?