@brenze: For recovery mode you need 2 things: a recovery kernel and a recovery root file system.
Recovery kernel is installed on all stock readers.
But recovery root file system is not.
Either it can be in a file in internal memory - by rooting this gets installed automatically - or you need a special update.img file on external sd card. SD rescue works like that, but SD rescue image is not appropriate if you want to enter recovery console. You need a special update.img file that only provides console access via USB serial connection, but in contrast to sd rescue images does not format internal memory, etc.
So what we need to enter recovery console on un-rooted devices
* A special file that has to be put into internal memory (like rescue.updater mentioned by rupor) or
* A special recovery sd card image (like http://sonyfmngr.sourceforge.net/Rel...upor-rescue.7z
I also think it is possible to boot a complete android image via sd card update.img!
But I haven't tried that yet.
Please correct me if I am wrong...
Wiki article has been updated: http://wiki.mobileread.com/wiki/PRST...covery_Console