Displaying Twitter timeline with Twitter Pull

Hello all

First post, and quite new to Drupal, so sorry if this is a really stupid question (though would be great if it's a really simple answer)

I'm trying to get a Twitter public timeline to display. Using Twitter Pull, the Openpublish 'Our Tweets' block works fine. How do I get a similar block showing tweets from a different Twitter account? Is there a way of editing the OpenPublish Tweets block to pull from a different account, or do I need to set up a new block, and if so, how?

Fairly stupid, eh? Thanks to anyone who can take a moment to help