got a way to install Acrobat X.
source:
In order to get this to install on my hacked WPDN with 09/23FW, I had to change the contents of my /system/build.prop file from: ro.build.version.sdk=4
to: ro.build.version.sdk=8
with root explorer this is done in a few secs. After a reboot you can install.
edit: soondai already explained
