Explain "except the radio"...if your're unable to get locked in a cdma network (verizon one only works in cdma mode) and in your country ther's no cdma provider that make sense againI flashed a complete Verizon dump on mine and everything worked except the radio, so I imagine it would be the same the other way around. By all means though give it a go, bear in mind they are different models and so most likely have hardware differences (no LTE upgrade in europe).
Hope that if you find and flash a gsm/euro dump in your euro xoom it will work again on gsm network