1. AOKP ROM for Xperia Tablet Z
2. Google Apps
1. Make sure you have CWM recovery installed on your Tablet.
2. put your downloaded zip file in internal sdcard of tablet.
3. Reboot your tablet in recovery mode
4. wipe data/cache in recvory
5. Install zip from sd card > choose zip from sdcard
6. Head to that file where you putted before and tap it
7. click yes
and enjoy ROM