I resized Xperia Z bootanimation for MDPI device (320x480) with the best quality!
INSTALL MANUALLY
-> Download and copy the Zip File to your SDCARD.
-> Copy it and paste it inside root->system->media. (copy and replace)
-> Now change permisions rw-- r- r-, Reboot system.
-> That"s it.. You must be seeing this Bootanimation after the Kernel logo.
-> Enjoy...!!!