You should not edit files that are in the built in database folder.
With ARC PATROL you can add/edit 'favorite' files so you can create a favorite file with CB, FRS etc and then after uploading select that favorite file. You can not scan the built in database and favorite files at the same time, that is a limitation of the HP1.
Open each of those 10 state files in ARC PATROL and then add a conv. system containing all those frequencies.
But next time you sync with Sentinel that data will be lost so backup those files before the next dbase sync.
Sentinel uses a different database so its very unlikely that editting the missouri file on the HP-1 card changes the Sentinel database on your PC. These ARTCC freqs are nationwide so are duplicated in all states.