Upgrading from CM7
Download Acmeinstaller2, CM9 alpha 0.5 from
[Release][Alpha0.5] CyanogenMod 9 Touchpad - RootzWiki
If you haven't installed before, you'll need CWM and moBoot as well. BTW, moboot is version 3.0.5 now. Might be a good time to update. If you haven't installed CM7, see
Getting started (CM7 for your Touchpad) but use these files instead.
Make a backup in recovery since this will replace CM7. Complicated info to triple boot webOS, CM7, and CM9 coming later.
Where to get gApps?
These should all work, but the first one I've seen used the most often:
gApps 4.03_v10 followed by the gApps fixer
gapps_ics_4.0.3_v8.zip MEGAUPLOAD - The leading online storage and file delivery service
Techerrata Downloads - Downloading gapps-ics-20111230.zip
goo-inside.me - gapps downloads
(I tried them all, but email was always broken until I did a factory reset.)
Wiping data?
According to Dalingrin, you shouldn't need to wipe data if using Acmeinstaller
2 (don't use the original Acmeinstaller with CM9), but will need to wipe data if you install from CWM (recovery). From my experience, I had the best results (no FC's) only after wiping data.
Installing CM9:
Copy your CM9, gApps, gApps fixer (if used) to your cminstall folder.
From a command prompt:
novacom boot mem:// < ACMEInstaller2
My experience was that gApps wasn't installed (still in cminstall folder) so reboot into recovery and flash both gApps and the fixer then reboot. Open Market and add your Google acct.
Nova:
You might want to use this launcher: [APP] Nova Launcher Beta (ICS based) - xda-developers
Download the NovaLauncherUpdate.zip and flash from recovery, then open the app and check for updates in settings.