Originally Posted by uboot
I modded the sd recovery image from porkupan to make it flash my resized data & sys partition
I don't understand what you mean... I think there is no need to modify porkupan's recovery to overwrite any partition (extended or not)...
I mean, I've extended my system partition by using the gadget serial into recovery mode without any problem...
What are the modifications that you are speaking about?
Have you found the Android image to boot from Micro-SD card that you said here
There, you have said:
"But: it seems that you can boot a completly working Android image from SD Card!"
Do you remember what did you wanted to say? I would like to continue your investigation