This is the method I used to get a prefect glitch free install of liberty. There are other ways like simple data/cache wipe then install but I can say doing this process has left me a fast and issue free install of liberty.
1. Download Maderstcok340.zip and place on sd card wherever you keep downloads. Place the .apk's for z4root and bootstrap recovery on sd card, handy forever trust me. For those that don't know this zip file combines all the tbh patches and successfully installs the 340 ota and you will be un rooted thus z4 and bootstrap.
2. Reboot into recovery and select zip from sd. Navigate to your maderstcok340.zip and install. It takes a few minutes as it replaces everything bootloader, kernel and all....so wait then reboot.
3. You are now on clean .340. Activate your phone but skip all other setup prompts. (not needed yet and saves time). Install z4root and let it reboot.
4. After rooting skip everything again and install the bootstrap apk, boot into recovery.
5. In recovery just to be anal I cleared data/caches again. Now install Liberty 1.0 from sd as usual.
6. Done! Reboot and now sign in and restore stuff however you do it and enjoy trouble free Liberty!