Yes I Can!

How To Install Android 4.0.1 ICS On Galaxy Tab

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Step 1: Download the latest build of Ice Cream Sandwich for original Galaxy Tab.

Step 2: Transfer the .zip file to the root directory of your Galaxy Tab.

Step 3: Turn off your Galaxy Tab. Boot into ClockworkMod (CWM) Recovery Mode by holding a specific key combination. This can be found by performing a simple search on your favorite engine.

Step 4: Format /system, /data and /cache from mounts and storage under main menu of CWM.

Step 5: Wipe data / factory reset from main menu.

Step 6: Go back to main menu and choose the .zip file you transferred in step 2 from install zip from sdcard > choose zip from sdcard. Ice Cream Sandwich will now be flashed to your Galaxy Tab.

Step 7: Reboot device from main menu.