from experience, i achieved an uai of 66.50, v. low.
Now you could actually try an enter any course that gives you entry i.e. < 65.2 and then do the units in science that you want to i.e. the units of your science degree. Then work as hard as you can to achieve a higher than credit average for a transfer.
For instance, i enrolled into a Bachelor of Technology which its uai for 2003 was on the dot 66.50 and then i tried my best to get a better than credit average mark and now i am able to transfer to my preferred course.
Also, just to note that if oyu want to do a uws course and then transfer to usyd or unsw, it will be a waste with your uai.
But to reassure you, a low uai isnt the end of the world, it just limits your choices. Mind you, as long as you work extra hard, you will do fine.
Also consider that uais are dependant on demand, so these uais might go higher.
good luck. If you want some info, D-Day (Decision Day) is on the 4th on Jan @ the Parramatta campus. if you want to talk to some lecturers about what to do, do it there or call the course info centre (but i dont reccomend it-they know nothing).
hope it helps and good luck
EDIT: you want to go to UWS right? If i was you, i'd choose anything tha thad a low uai (order from highest uai to lowest). If you get into the course but not on your preferred campus dont worry, you can do any unit on any campus except parra or bankstown, just need extra paperwork and alot of commitment.