For those that are newer to Joomla and need help getting to view DT Register on the frontend of the website after getting everything set up... You need to create a component menu item. Here\'s how to do this in Joomla 1.5:
1) Go to Menu -> Main Menu (or whichever menu you want to add the new item to)
2) In the top right corner, click \"New\"
3) Now you\'ll have menu item TYPES to choose from. In the right column, click on \"Component\".
4) Give the new menu item a name and select DT Register from the list of components just under the Name field.
5) Click \"Save\" in the right corner and you\'re all set!
You should mention that you cannot restrict this menu item to registered users - it has to be set to Public, otherwise the PayPal IPN callback will not be allowed to access the component.
I just spent 4 hours figuring that one out the hard way >