I would definitely avoid using the basiclti4moodle if you are using a supported version of Moodle, as that has not received an update in nearly 2 years. The good news is that as of Moodle 2.6, the External Tool plugin should be able to support all of your sub-plugin needs. The related ticket is MDL-36224, which actually gives an example of a dummy sub-plugin that you can install under mod/lti/source to have it display in the Activity Picker. You can also launch directly into the LTI Provider upon selecting the activity by tying into the add_instance_hook . We'll be adding much more detailed information to the External Tool documentation within the next few weeks, but in the meantime if you have questions please feel free to private message me as I don't always see Forum posts.
by Kris Stokking.