Sure, LSPDFR is "playable" without STP or Ultimate Backup, but you lose the functionality and features that they offer. After using these mods, LSPDFR feels rather bland playing vanilla.
You used a variant of the SFPD logo that does not appear on any SFPD vehicle I've seen.
I see this all the time, however.
https://commons.wikimedia.org/wiki/File:Logo_of_the_San_Francisco_Police_Department.png
Other than this, spot on.
Beautiful pack, with a small complaint from me. Different light patterns are shown when using Yelp (all lights [besides red burning light] flashing during Yelp) and the Airhorn (all red lights are steady burning, rear lights flashing as normal); are these planned for the future?
Video for reference here: