My first blt mod, and seriously, I still not believing it actually works because I know literally nothing about coding, but anyway...
Pretty much self explanatory, you can enter any vehicle while carrying loot.

!!!ONLY WORKS IF YOU'RE THE HOST OR IF YOU'RE PLAYING SINGLE PLAYER!!!
If both you and the host has the mod then both of you should be able to use it without problems, I don't know, I didn't tested this part, got nobody to test it with me (forever alone)...

Install it on /mods folder.