Cool thanks a lot so far,
but have you tried to change the newest Version - Cool_Reader_3.0.55-46 ?
I play a little bit with the apktools but everytime when i choose compile an error occures.....
But maybe I┬┤m on the right way, my last hope is Apk Manager.... I give it a try
Do I need the framework.res of my actually Firmware to change any other APK like Cool Reader ?
Edit.... I give up, everytime I try to compile the error is shown up....
This is sad

Hmmm, i think i have found the Problem.
I use a Rom with 2.2.1 which is SDKtargetVersion 8, but xLargescreens need min 9 - so what should i do?
Could i change the number in the manifest from my readers framework.res ?
Or would the App work in Fullsceen without xlargescreens ?
How do you do it? Use you a other framework.res and change the Text in the App to archos/rockchip ?