Forza Motorsport 4 #91 Team ORECA Dodge Viper decaling help

Is there any way to put decals on the side of the WING of a year 2000 Dodge #91 Team Oreca Viper GTS-R? The (default) paintjob, when this car is purchased, shows each side of the WING as having a MOBIL 1 decal…however, upon re-painting & decaling said automobile–I can’t seem to “…find that sweet spot”. Does anyone out there have nothing better to do than to answer my stooopid question–'cause I would LOVE IT if someone would!!! This is killing me. I don’t want 2 die because of something so mundane…HELP!