Ok so i have LSPDFR, and sooner or later you get shot up and end up at hospital, i remember seeing in a video a menu that looks similar to the Backup menu where you could spawn another vehicle and give you self full Armour, anyone know the name of the mod?

Probably Simple Native Trainer, find it here: https://www.gta5-mods.com/scripts/simple-trainer-for-gtav

yep thats the one, thanks

 

It's easier to just make yourself invulnerable using the trainer so you don't have to do either of those things.