Page Customisation of an award scenario

Hi Experts,

When you create an Master Agreement from an awarded scenario you go thru creation wizard selecting document type, collaborators etc..

At certain point you have to choose where to place items: master agreement or agreement level. An agreement level is a default option.

Don't you know how to change this default option to a master agreement level? My users are very confused as they always should remember to select master agreement level.

I've tried with page customization of the object called "scenario to contract container" but  it seems this doesn't react on "hide" or "required" property.

Don't you know by chance is it possible to change this with page customization or in any other way?

Thanks,

Marcin