If we want to publish our app on OVI, then do we need to send singed sis file or unsigned.

In welcome page of OVI publish I found this information:

Once you have completed your development and testing of your apps, upload the unsigned version to Ovi Publish using the Nokia provided UID – Only this UID will be accepted for unsigned content.
And I have 5 UIDs (02x.....range) provided by OVI, which UID I should use in .pro file before creating the sis file?
The DevCert (.key and .cert) only for testing or do we need to use these for publishing.

Please focus on all the above points, so that I would be easier for me to publish app on OVI as soon as possible.

Or correct me if I not correct in any place...