This is a question that came up for me, and then I saw another post about it.

As a module developer, I'd like to be able to interrupt the loading of blocks for a specific region and allow the insertion of user-specified content into that region.

Is this supported in PHPTemplate for Drupal 5?

As an alternative, I can create a path-specific template and remove or overwrite the regions I don't want, but I can't install that template as part of my module distribution.

See http://drupal.org/node/125977
And http://drupal.org/node/126513

For the background.

- Ken Rickard
agentrickard