Click on the resources (blue text) in my post above and it will lead you to a link with a definition of the acronyms in use.
To find the kits you need, use the forum Search function; there’s an explanation of how to use Search to find the user-created kits, also in resources. Here’s a link to the first two kits: Substitute Standard Pro with Bass kits
you shouldn’t have too much trouble searching for and finding the third (STAX) kit.
Download, unzip, use the BBM to import and activate the kit.