Yes. The menu only is for free mode characters at the moment, so if you want to play as the story characters you can select it through the LSPDFR menu when going on duty. Make sure you have the EUP LSPDFR configs.
It doesn't use the LSPDFR API so it should work. If there are any keybinding conflicts, you can go into the CopHolster.xml and change the IntimidationToggleKey and/or IntimidationToggleButton to something else. Check the ReadMe for more info on that.