Oh trust me I have over 50+ Add-On emergency vehicles all customized to my preferences that relate to my department (just use Los Santos & Blaine County) for more realism, more variety rather than the typical bland per agency. Like I said I just switch between LCSO/BCSO & LSFD/BCFD liveries when I want to change...but thanks for this I shall check it out if it means I can have all agencies in the game at the same time, unless it gives me a headache like yours hahaha.