The install is assuming you are running Sugar 4.5.1e. If you are using the OS version there is one bug that you will need to fix a bug in their portal code (I've submitted the fix and it should be included in 4.5.1f). In soap\SoapPortalUsers.php find this line and comment it out:
            //$valid_session->save();

Configure Sugar:
1. Activate the portal in Sugar in Admin->System Configuration by checking the Enable self-service portal integration? box.
2. Create the portal user in Admin->User Management->Create User. Give the portal user a username/password. Username is generally something like 'portal'. Check the "Portal Only User" check box and Save.

To install:
1. Save the zip files to your computer. 
2. Open up the Joomla administration and go to Installers->Components (on the top menu)
3. Browse for com_sugarbugs then Upload File & Install
4. Repeat for com_sugarcases
5. Go to Components->Sugar Cases->Configuration (top menu)
6. Setup the username/password for your portal user that has been set up in Sugar. Enter the correct Sugar Soap Location for you install. Save.
7. Now you are on the Field Selection page. Make any changes you'd like here included what fields to show in lists, basic search, advanced search, and the display label (caption).
8. Set Bugs Field Selection by going to Components->Sugar Bugs->Field Selection.

To Test:
1. Create a username for an existing contact to test in Sugar by editing a contact and adding a 'Portal Name:' at the bottom and checking the Portal Active box.
2. Create a user in Joomla under User Management and give it the username that you assigned the contact in Sugar. Fill in the rest of the details as desired. (Step 1 and 2 can be in reverse order)
3. Log in through the front end with a user that is set up in Sugar to test.

That should get you up and running. 


Extra features: 
1. Basic/Advanced Search
2. Ability to edit display labels (captions)
3. Some pagination support (full pagination support is dependent on sugar modifications)
4. Search by bug/case number on list page
5. Display only fields in new view that are editable.
and many more...