How is this for you? I only get a PDF file with squares and lines on it. No part numbers, no pin numbers, no IC signal names. It could be the schematic for anything. I am running a Mac so it might be an odd sort of Widows PDF.
well, it's not the best diagram I have ever seen, but still you can get an idea of the schematic. The most usefull link is mabe the comprehensive 163 chip datasheet, wich at least give you an idea of how the maytrix is driven.
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as there is no common ground, but both ground and positive are switched on and off by the controller
Yes that is how a matrix works. See my page:-
http://www.thebox.myzen.co.uk/Workshop/LED_Matrix.html
ok! so maybe you could suggest an amplifier for your circuit, and that could apply to mine and others as well!! 
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Maybe something with NPN transistor on the 8 Vcc pin(LED's common anode), and PNP transistor for the 24 RGB pin?
It is not as simple as that because you need something to limit the current through the LED. A resistor will not cut it for a 1W LED because the forward voltage drop of these is not stable. Therefore you need something like a constant current supply to limit the current as well as hefty drivers. FETs will be better than transistors at these values.
well, to be honest my LED modules already have an internal resistor in order to make them work with 12V, so maybe this won't be a problem..
anyway you think something like this could work?
or you suggest a normal FET?
thanks again!!
as I thought, it's not so easy to 'boost' a matrix then, but I need to do it!!