Adding cars to a job. HELP NEEDED

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Hi, for a few days ago i bought a garrysmod server.
Ive been adding much jobs and i do very well.
And then i came to the part : Adding cars to the job Car dealer.
Ive been searching many places to get this done and continue.
I came to facepunch to get help. Please help me with it.
I want jeep and airboat in the f4 menu for the job like this TEAM_CAR .

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Any help ? pl0x