Shas,
Dont worry, if what you said in previous posts is accurate, just go on with your life. Do not change anything. And apply for adjustment of status based on your spouse. Do not send your application to your local office, check the I-485 to see the address where you can send it since it depends on the state or US territory where you reside. (Example: I sent mine to the Chicago Lockbox since i live in Virginia).
Start with the doctor first (Medical), take your old Medical form with you from when you adjusted in 03. Check the uscis website to get the list of doctors authorized in your community. This process takes 2-3 business days. Do your joint taxes for 2006 since you need copies of your tax returns. If your spouse is making decent salary, instead of filing I-864, go with I-864 EZ version, downloadable online at the USCIS website. Check out also the poverty guidelines I-864P.
Dr Iha, what do you think?
Let me know for more info.