firstly dont do any of the following in Battlecrap. you dont need it. just use winrfa
easiest way to understand this is to extract both streets and streets_rcc to seperate folders on the desktop then take a look at both and compare the differences.. anything that is added to streets_rcc should be added to your deathrace map (start with a new deathrace so its clear..)
anyway.. make a new folder on desktop called deathrace and then with winrfa extract the original deathrace map to this folder.
also make a streets_rcc folder on desktop and extract that map too.
from streets_rcc copy the entire texture (not textures) folder, the standardmesh folder, sounds and the objects folder to your deathrace map.
now (in your deathrace map) open all the con files in the objects folder and change anything that says 'streets_rcc' to 'deathrace' (if required at all..)
make sure you have added the run objects/objects line to your maps init.
open the objectspawntemplates.con in deathrace and find the stratosvigi and stratosking
You can leave the 'stratosvigispawner' and 'stratoskingspawner' alone.. just change the 'stratosvigi' or 'stratosking' to 'buggyred'
now make sure you have made a copy of the original deathrace as a backup. (put it on desktop or somewhere safe..)
now you can pack the map as deathrace and you should have rcc cars instead.
to rename the map again, dont use Battlecrap.. instead just change any instance of 'deathrace' to 'deathrace_rcc'
you need to change this in the main init.con and in the init folder open terrain.con to change it in there too. you also need to change the maps name of course.. tha main folder that holds everything.