i dont understand what u mean? To flash 1.2 without any addons?
You already have the rom installed
You said you had this problem when you flash the 1.2 zip
So
Flash the 1.1 zip in cwm with system mounted
Or open the 1.1 zip & remove everything except the meta-inf folder & system/app/systemui.apk and then flash the zip If you don't want to revert all the apps
You said systemui.apk force closes so the logical thing to do would be to revert to the previous version