As with all flashing procedures, you will need a rooted device with ClockworkMod Recovery installed. You can follow our guide on how to root Droid 2 Global and how to flash ClockworkMod Recovery to meet these pre-requisites.
Step 1: Download CyanogenMod 9 for Droid 2 [MediaFire] and Google Apps [MediaFire]. Transfer both ZIP files directly under the /sdcard directory on your DROID 2; we will flash them in a later step.
Step 2: Reboot into ClockworkMod Recovery. You can either do this manually or from within ROM Manager by tapping on Reboot into Recovery.
Step 3: Once inside ClockworkMod, take a nandroid backup. This may come handy later on if you wish to revert back to your current set up.
Step 4: Select wipe data/factory reset from the main menu. Similarly, select wipe Dalvik cache and wipe cache under the advanced option.
Step 5: This is the part where we flash CyanogenMod 9 on your Droid 2. Select install zip from sdcard > choose zip from sdcard > N.HA D2G CM9-ICS 4.0.3 Alpha 1.zip. After flashing CM9, flash Gapps ICS 4.0.3 11.12.22.zip from the same menu option.
Step 6: Select reboot system now from the main menu.
If you followed the steps correctly, your Droid 2 will now boot into an alpha, unofficial build of CyanogenMod 9 based on Android 4.0.3 Ice Cream Sandwich.
For queries, check out the official thread on XDA.
