Binary morphs are Poser PMD files. It is a way that Poser will store morph data externally from the cr2. The best way to store morphs for injection IMO is by INJ-REM pose files. You can have only one binary morph file for a single figure. But with INJ-REM pose files you can have as many as you have channels for.

If you just want the morphs loaded with the clothing then just leave them in the cr2.  Turn off the use external binary morph option in the Poser edit menu, and your morphs will be stored in your figure cr2