Hi All,
We have a requirment where if we create opportunity ( from account ) Standard is making account property as readonly but in our business scenario we dont want such behaviour.
Hence i tried to change the property using extensibility explorer and bound the READ ONLY property to a field.
Now that didnt work , I found root cause check below images!
1. Property of field. which is binded with one of the field in data model.
2. Assignment of constant to the field which is binded to the property of the field.
3. Data model : the field is not binded to any field! 
Now is there any way where i can change the field in my data model! ( This is a standard view )
Btw in extensibility explorer i have changed thje property of the field but i think it is calling our configuration first then standards( this should be other way round )
Regards,
Dhruvin