I think you understood it all correctly
The best way to lern is to try it.
- put gaia.pkg on the root of your USB HDD. ("GAMEZ" version will store the games in the "dev_hdd0/GAMEZ/" internal folder, while BDRIPS will store games in dev_hdd0/BDRIPS/. It's only for the internal location. For external, it's always on the USB/GAMEZ/
- Put comgenie.pkg at the root too (if you need it), you can also try BlackB0x_FTP.pkg (1.1, or 1.2 if it's working fine for you)
- run the console in debug mode, then go to the menu "install package Files" and you will see the .pkg present on the root of your external USB.
Select them to install the package to the internal.
- To run games, start the console in debug mode every time. then connect the external USB with GAMEZ folder on the root of the USB.
If your game is an "external compatible" game, just put the BLESxxxx (or any other name) in the USB:/GAMEZ/ folder, Then run the intalled application "Gaia Manager".
It will then list all games found in the HDD0/GAMEZ/ (or HDD0/BDRIPS) and USB/GAMEZ/
- Select the game and press X to reboot to XMB with the game loaded in memory.
- Go to the menu "PS3 Game" located just before the "install package", it will load your game from here.
Some games need a disc in the drive. If that's the case, run the game from the disc icon instead.
Some games may have files bigger than 4GB, and can't be copied to FAT32, so launch the FTP server and connect to the PS3 from an FTP client on your computer.
navigate to dev_hdd0/gamez/ and tranfer your game folder into it.
Another thing : You don't need to uninstall managers to update or try another one. Just install the new one, it will update/replace the old one with the same GameID.