To find usefull iMessages on an iPhone, we created a "lightgrep" grep-expression.
Lightgrep is an addon for Encase that can be very usefull if you use searching with keywords and/or Grep expressions in Encase every now and then.
To find all "complete" iMessages we used:
iMessagep.[^0A]{50,1024}
This resulted in all the iMessages with a maximum lengt of 1024 (longer ones are cut off)
