Is it possible to change the Twitter agent name to custom name?

Question From User - Answers in Comments.

I am using the wordpress plugin Twitter Tools by Alex King, and was wondering if there is a way to change the name of the 'device' or 'agent'? (if thats the right word) from where the tweet originated. I tried to change some things in the PHP but couldn't get it to work.

I am trying to change it from this:
28 minutes ago from Twitter Tools

To something like this:
28 minutes ago from CUSTOM NAME HERE

Any help would be appreciated - thanks!