How to Rename a Module?

Ok, so I want to take the Module 'Groups' and have it display something other than 'Groups' on the webpage navigation, and other areas, ect...

But no matter what I do to edit the install files, I can't get it to Display what I want, I just keep running into errors.
[Then again, I'm not good with PHP or MySQL...]

How simple is this to do? All I want it to do is Say 'Grand Companies' Instead of 'Groups' without changing the database structure, or web urls/uris/friendly permalinks and what not.

I'd appreciate any help! 

you can probably try changing the value of the language keys. Go to Admin - Settings - Language Settings. In the search field type groups and press enter. It will bring up all language key references that include the word groups in them

Wow, that's a lot to go through, but thank you!

For a module you do not have to search for the language keys. Just go to modules/boonex/groups/install/langs

Edit the en.php file in that folder changing what you want.

Then go into admin->Modules->Add & Manage and just recompile the groups language.