annnnnnnnd i have no idea how to do any of that. so maybe this wasnt a good place to jump back into the world of arduino
Look at it this way: you are wanting to somehow magically record a device that has a "clock speed" (frequency) approximately 27 times that of the Arduino, which is running at 16 MHz.
This is impossible - research "Nyquist Theorem".
Grumpy_Mike is right; you won't be able to do this with an Arduino (you might not even be able to do it with a standard PC running at 1+ GHz, but you stand a better chance).
Really, what you need to do, is to get access to the transmitter, and get access to the signal train prior to 433 MHz transmitter. Something tells me that the manufacturer of these systems likely made them as difficult to hack as possible (just personal experience with closed media systems like this); you may or may not be able to take a standard 433 MHz receiver and transmitter, and get them to work.
Something else you might try is to contact the manufacturer if they are still around, and see if you can simply buy a transmitter, or if they would be willing to give you some specs or whatnot. Likely the transmitter is expensive, and they are unlikely to give you specs, but it can't hurt to ask; you never know what they will say until you do!
There's also this:
http://www.happcontrols.com/amusement/jukebox/600069001.htm
I suppose that puts a lie to my previous statement about them being difficult to hack - so obviously someone has done it; maybe the information is out there already (ie, maybe somebody has already captured the streams and posted them on an FTP site or something)?
