parenting assessment

Hi. I am from Canada. We signed a separation agreement right before we moved provinces. (I wanted to go back to my home province- all of us - so that I could go home to re-educate myself and we could live in two separate households. Him being a doc, he is in a very nice position where he can get a job just walking in any door and saying hello.) The agreement stipulated he would give me a certain amount for child and spousal support. (I had stopped my science career and was a stay at home, home schooling mother - he wanted to move to a rural town so that he could be chief of the department right out of residency. For me, i was an hour and a half one way from a university and thus geographically and professionally isolated career wise for over 10 years) I actually undersigned the money portion, just so then I could get back home with the kids. I am now going back to school part time. We agreed to joint shared custody (50/50) with him working FT and me going back to school. He also agreed to pay mid range child and spousal support. I never put in the clause to have his support payments taken from him monthly with maintenance support. Foolish, I know, but I never thought he would be a dead beat. (I didn't know he was a narcissist then either until I was told one day....you know you married a narcissist, right?) Of course he promised to pay for my school up until the day of the signing. Two months after we signed the agreement, he sent me an email saying that he has "decided" that he does not agree with paying me spousal support at all and that he is going to cut down his hours to part time so that he can "care for the children when they are in his care." TRANSLATION: he does not work at all -even when they are in school during the day. He has to be "on call" in case they ever need to leave school for illness or any other normal kid reason. He now just pays me whatever crumbs he feels like. We have taken him to court and the judge was very concerned and told him to get his ass back to work and pay the arrears. My lawyer in my current province has totally caught on to his n behavior has figured that we need the parenting assessment for several reasons 1) to change the custody. 2) Once the custody is changed we can go full speed ahead to get the financial part taken care of. If I receive more custody, the child support table would go to high not mid support. 3) we want to only go to court one more time -he has tried to bait us into court several times (serving notices and never showing up). He is now financially abusing me in the courts and we are trying to limit that to the best of our ability. The next time we go - we are going to go with everything in place so that he has no room to manipulate. He works for a hospital right now as an employee part time. He still makes what we agreed on but refuses to pay me that amount. The law here saws that it doesnt matter what you "want" to make, it is what you "can" make that dictates support. The noose is tightening because when we go back to court the next time - his goose is cooked! We just want to have all of our ducks lined up perfectly. Thank you for your responses...it is so wonderful to have people who truly understand and are so supportive.