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The VN modules (theres 2 or 3 for the VN series) are incompatible with the Aerpro aerial anyway.Try this http://forums.justcommodores.com.au/attachment.php?attachmentid=2360&d=1117703288 its for the module if the buttons arent in your car dont run the wires for them.
I bought my Aerpro Aerial for $80 at JB Hi-Fi, and they said $30 to fit it, so I agree. Worst comes to worst, just get it done professionally.Mate I got mine installed for $50. Worst comes to worst, that's all you'll be up for. Any stereo shop should be able to do it for you. By all means, have a crack at it yourself though!