Installation sequence and folder

Currently, I'm using Joomdle R0.8, Joomla 1.5.x and Moodle 1.9.x. I would like to integrate them together and using Joomla as the main platform. I would like to request for some enlightenment here in the sense of the installation procedure.

I have installed Joomla into Joomla folder and Moodle into Moodle folder and tried using Joomdle to integrate them and expecting Joomla platform to appear when I type http://localhost. However, only the directories appear. Now if I type http://localhost/Joomla or http://localhost/moodle, both platforms will appear separately. Should I install Joomla onto the root directory (http://localhost/), for the whole thing to work? If I have already installed into Joomla folder, and need to install onto the root directory, may I know how to shift all the files for it to work the same without the need to re-install it?

Please help! Thank you!

Hi!
I've seen some other posts and tried out on my own. It seems alright at the moment.

Thanks for any attention!