Flexiblock "Administrator defined blocks" and adding content

please help!!! i want to add content to my newly created flexiblocks. am i right in assuming that i make any changes to the flexiblock module???

Administrator defined blocks

An administrator defined block contains content supplied by you (as opposed to being generated automatically by a module). Each admin-defined block consists of a title, a description, and a body which can be as long as you wish. The Drupal engine will render the content of the block.

');
case 'admin/modules#description':
return t('Adds flexible location key to blocks for use in custom themes.');
case 'admin/flexiblock':
return t("

this is the code in the module, but where do i make any changes to the actual block...

thanks!!!