Avoid invalid ssl certificate popup ?

Is there a tool or a method to avoid the "invalid certificate" browser popup when sniffing ssl traffic ?

I've expiremented with ettercap and webmitm and also sslstrip

But I'm wondering if it's possible to keep the ssl connection (not like sslstrip) and yet sniff the traffic without the warning ?
Could it be possible to put our own face certificate on the victim's machine to avoid further popup ? I'm interested in any method practical or theoretical.

Thanks

Don't think so, depending on the browser of choice, it will warn the user that the certificate is possibly fraudulent, you could try by adding your own SSL Details, i know there's an option for it somewhere, but you will need to set a generic one for soemthing like "Verisign" but it may or may not work.