Issue in Installing Sap Web Dispatcher

Hi Experts,

We have Installed Sap Web Dispatcher in our landscape for https connection and we have generated the pse certificate .We were stuck in the next step as we have to forward this request to a certification authority such as Verisign or Thawte. 

Can you please let us know the process on how we have to forward this request to Certification Authority.

Thanks in Advance..

Regards,
Krishna.M