This is not the right forum to properly discuss trial preparation. If you have 3 years, go to law school and figure it out. Just kidding you a bit, but this is very complex. If you do not have an attorney, get one.
In short, you will have to submit a trial brief and you will be able to present documentary evidence as attachments. This can and should include the mediation recommendation.
In addition, before trial you will also submit briefs and attend at Mandatory Settlement Conference. Maybe this will keep you from having to go to trial.
As a final note, it is likely you will have the same Judge and he or she will remember and be aware of the current temporary order. You are in a strong position and if you handle your case well, you should do just fine.