yes, using spoilers+else stuff requires a thing called ''licence'' , and that costs ya. also if you fealing real good you can buy it with larger bodykit, larger engine and slicks.
also you are able to get a modifed XFG
I just realised he posted in the skins forum, so I edited my post a bit.
Take a look at master skinnerz, there's probably a pro-kit for Bodykit parts to add to skins for XRG. You will need photoshop or something to read the pro-kit files which is are .psd format. IIRC
Hard Way ^^
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Easy Way vv