You know, that the FPGA on the Zeus68k isn't a BGA one?
So your quote is quite useless if you ask me...
mr.vince: you know the german regulations and you probably know, that you can use lead in your products, unless you don't violate a certain limit.
The mayor problem is, that leaded and unleaded solder have different melting temperatures. When the leaded solder of the BGA FPGA is already molten, the unleaded solder doesn't even think about melting, so you won't get proper joints.