I am trying to slow the speed of the credits as they fly by at lighting speed. I noticed the velocity is not an option. I am using vegas 7 but have vegas in a box for new system.

if you are using the Rolling Credits media generator then simply open it up and go to the top where the time set is. It defaults to 10 seconds. Set it to whatever you want then close the box and go to the media on the timeline and strecth it to the notch in the top, that will be the time you set. IE 40 seconds,50 seconds whatever.
That should do the trick.
Don