Hi, well, allright, I made it to "cook" a ROM without these crappy chinese apps. Using the tips of the last posts in this topics you can open end edit system.img and update.img.First open and edit system.img (e.g. delete/replace/add some apps - in *.apk-format) and copy it to the RK28 - img - folder. Just Overwrite the existing system.img.Then open the update.img. There you find another folder with images. There you also replace the system.img by your version and recompress the update.img.Copy this to your RK28 img folder and reflash your device WITH the update.img box checked.Voil?, now you've got a device without the mess.All modifications at your own risk. Not for absolute noobs...