Save Game Boy Camera pictures to computer

Hi,

I used to make photos with Game Boy and the GB Camera can hold 30 pictures. There is a MadCatz cable with software for Windows 95 but is rarely available on eBay and the cable is a Game Boy - Parallel PC cable which is out of question on a Macbook - plus it would be an interesting project to make.
I found some documentation on programming the printer but not the other way. The trick is the software emulates the printer then this way the data can be downloaded.
I cutted a GB link cable and there are four cables.
I connected them to digital inputs on Arduino, set 9600 baud rate and hoped for the best.
Nothing happened (Printer error 02 - the same as when not connected at all.
Can someone point me to the right direction?
thanks much in advance