xbap application

[aaru24x7]

We have a xbap application that needs some dll's to be installed on the client desktop machine. When the user accesses the web site, the xbap application checks to see whether the certificate is installed (we have not written code for this and would like to know how to detect whether the certificate is already installed), and raises a message "Trust Not Granted, click here". We would like to know how to customize this message. When the user cliecks the link "click here", we install the certificate and also the dll's required by the xbap application. 1. How do we customize the message "Trust Not Granted, click here" 2. How can we check whether the certificate has been installed ? 3. How can we check in the xbap application as to whether the dll's have been installed ? Thanks in advance.