Before anyone shouts I have tried searching for this but being new to these forum things I haven't been able to fully answer all my questions. (I wonder how long I'll get away with that excuse for

)
I'm picking my GTI up from a car supermarket on Saturday and as a result of both a need to get a fairly "cheap" car and a lack of patience to wait for the exact spec I want, I haven't got all the options I would have liked (Xenons for one but I've conceded defeat on these!)
I
think that the car has the bog standard RCD300 (?) stereo with no ipod, usb or cd changer, and it definitely has an armrest. I have a couple of questions:
1) can a cd changer be retrofitted into the armrest? When speaking to the stealer on a test drive he told me that VW are moving away from putting the cd changers in the armrest and are opting to use the an in dash unit instead.
I have seen a couple of "VW cd changers" on ebay which IIRC look like the one in the armrest in my mates golf plus (see
http://cgi.ebay.co.uk/VW-6-DISC-IN-DASH-CD-CHANGER-GOLF-BORA-PASSAT-POLO-LUPO_W0QQitemZ140062834807QQihZ004QQcategoryZ75305QQrdZ1QQcmdZViewItem). Would this fit the gti?
2) Would i be better off just sticking the changer in the boot in the old fashioned way?
3) I've seen a post on here explaining how to retrofit an ipod connection to the glovebox. Can I do this and have a cd changer or will this confuse the head unit?
I realise I'll probably get more of an idea for this when I actually get the car and can have a proper look at it but I'm getting very excited and cant wait!
Cheers for your help