Bind 1-5 in defaults. Missions really need the option to pick a team though, using default team if none supplied.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>command</key>
<string>escript Scripts/Multiplayer/Racer.lua</string>
<key>description</key>
<string></string>
<key>scheme</key>
<string>Shoppa.plist</string>
<key>weapon</key>
<string>Shoppa.plist</string>
</dict>
</plist>