enable in browser elevated trust setting on client's machine without chaning Registry setting 'AllowElevatedTrustAppsInBrowser'

Hi,

We are developing a silverlight 5 application which detect a device from client machine and read file from client's machine. data are passed to server through wcf service.

Application has In-browser 'Eleaveted trust' setting enabled .

My issue is  we don't have registry editing permission on client machine. so i am not able to update registry setting 'AllowElevatedTrustAppsInBrowser'. on every client's machine.

Any alternate option is available for same?

Can any one help how can i configure Clientaccesspolicy or CrossDomain Policy for this setting?

Thanks & Regards,

KS