What do you mean a more detailed walk through??...its not rocket science to install apps OTA...all you do is go to the apps OTA link and download it to your phone..how hard is that??...theres no detailed walk through of how to do it.
Unless your looking for a list of OTA apps, which in that case you can find here: http://forums.crackberry.com/f35/blackberry-ota-apps-236714/ and also here too:http://software.crackberry.com/homeSoftware.asp
The second link you can purchase apps and then have the OTA link sent to your phone....its pretty simple.