Changing the FormRef on EcoResProduct

Hi, I want EcoResProductDetailsExtended to display whenever I click a product number in Dynamics AX 2012 R2. The default (set on the FormRef property of EcoResProduct) is to display EcoResProductDetails. When I change the FormRef property to EcoResProductDetailsExtended though, I get this message: "Could not process the lookupTable value on the Args instance. The table 'EcoResProduct' does not exist as a root FormDataSource for the form 'EcoResProductDetailsExtended'." This makes sense; it's a data source for that form but not the ROOT data source. Can anyone think of a workaround for this to get the results I want? Thanks for any input!