Thanks Hardik, that's what I'm looking for. I haven't tried it yet but I found this thanks to your post: Using AS-Path Prepending for BGP to Make Routes Less Preferred.
The “Remove and Prepend” type selection removes the specified number of latest AS numbers added to the prefix and prepends the firewall's AS the same number of times.
HULK you understood it right the first time. I'm not trying to make a route less preferred even though that's what the link says. What's useful to me was the sentence at the bottom of the link about "Remove and Prepend". Based on that sentence if I choose "Remove and Prepend" and specify a value of 1, then it would be just like AS override.
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