There is a Drupal module for integrating Woopra into both Drupal 5 and Drupal 6 installations. The integration is deeper than what can be achieved by simply inserting the tracking code manually.
As of writing this post the module includes support for:
- selective tracking of users based on their role
- local caching of the tracking code
- explicit tracking on their username
- display users' avatars and email addresses (optional) in Woopra
If you have problems/issues with this module then please create an issue in the projects issue que at drupal.org.
Have fun :-)
edit: the href part of a elements are stripped so here are the URLs of the two links above:
http://drupal.org/project/woopra
http://drupal.org/project/issues/woopra
not a support question