Updating HP Touchpad to latest version of CM 9 Android
I recommend three steps:
1) Update to the latest Clockwork Mod
http://www.youtube.com/watch?v=qYwZNSLB7Nk
2) Take a nandroid backup
(skip to 4 minutes into this video)
http://www.youtube.com/watch?v=qYwZNSLB7Nk
3) Update to the latest CM 9 build
a) Download the latest CM 9 nightly build http://get.cm/?device=tenderloin
b) Watch this video on how to flash the latest CM9 build http://www.youtube.com/watch?v=7Kgn_mFtJc4
c) if gapps (play store, maps, dont't work you may need to update to the latest gapps package. The latter part of the video in 3b shows how to update gapps. For the latest Gapps package See the table on the right side of this link :
http://wiki.rootzwiki.com/Google_Apps
that's it. You're now on the latest CM Enjoy!