You can create your own ABR file by incorporating a number of streams with different bit rates into a smil file,
e.g. if you have a number of streams with different bit rates, or a number of video assets with different bit rates, a simple smil file like this will be all you need:
If you want Wowza to create a number of ABR outputs then you will need to add in the Transcoder AddOn. This will create a number of keyframe aligned streams from a single source, that again you can put into a smil file.
<video src="hi-livestream" system-bitrate="500000"/>
<video src="lo-livestream" system-bitrate="250000"/>
This document describes the various scenarios. Some (such as The Transcoder) may not be available as part of your "standard" version.
I'd recommend contacting email@example.com with a list of your requirements and they'll point you in the right direction.