any problem in putting rom 1.3 in A600?

[Harrison]

That's why for the best of both worlds a rom switcher is the perfect solution. Switch between real 2.05 and 1.3 kickstart roms for the highest game compatibility.

[Tiago]

Yes, but they are a bit difficult to find at normal prices...

[JLPedro]

I can give you detail pictures of the hack on my A600 to switch from 1.3 to x.x Kickstart. You only need kick 1.3 and another one, two resistors some wires and a switch (with long wires to go to the back of the case like mine). I can sell you a Kick 2.05 v37.300, i've seen on ebay kick 1.3 at an affortable price.