Hello Karen
Welcome to Poms in Oz.
On what date in June 2008 will Hubby turn 35?
I ask because I believe that it is now possible to submit an application for a skilled independent subclass 175 visa without waiting for the skills assessment first. I know no more about it than this, but if Hubby will be 35 on, say, the 2nd of June then it probably wouldn't be realistic to try to get a visa application ready in time. If his birthday is not until the end of June then it might just about be do-able.
With regard to which ASCO code Hubby;s skills might come under, I have just checked both lists for WA and I agree with you. Neither code appears on either of the lists.
Your Aunt in QLD could sponsor you for a sc 176 visa if she has Permanent Residence in Oz. (Which she must have after 20 years there I would think!) She does not have to be a Citizen so don't worry about that.
With regard to the skills assessment and which Code, if I were in your shoes I would consult Peter Chiam (ptlabs) urgently. He is an IT expert as well as a Registered Migration Agent and he has loads of experience with doing ACS skills assessments for clients. He would also be able to advise you on whether or not to risk a visa application without waiting for the skills assessment first. Peter's website is here:
Ptlabs Consulting
Peter is immensely nice as well as immensely capable.
Best wishes
Gill