Fanoush, thanks for your reply. Ok, I had mixed up things totally with kernel location. I had the impression that all was booted from mmc but that obviously is not possible
The patching itself was successful as I'm able to boot without mmc and my older 512 inserted. Kingston 1GB inserted while booting leads to total hang up, only showing maintenance icon, no boot options, nothing at all. Have to remove battery
I'll check number of pins later. Card is from local dealer and I'm going over to give a try with another card in 770.