Add field to configurator property set in PrePick

Hello.

Does anyone know if it's possible to add a new field to the configurator property set in PrePick mode?

We've got a requirement to be more flexible than Eligibility Mode 2 to display products. We needed that an extra field, calculated by the eligibity engine, would be passed to the rendered so that we could modify as we required, but so far I can't find a way to add the field. I've modified the variable map "Cfg Eligibility Variable Map - Row Set" so that the field having "In/Out" as "Out". The field is returned by the Eligibility workflow, but I can't find it when rendering. The only files that we've been able to put there are S_PROD_INT extensions