Couple of things I'm needing and some similar things have show up in the search but nothing exactly what I need.
1) I need to be able to pre-populate both the standard fields and the "additional fields" by grabbing from the URL. I know a little bit about the GET method but not at all in this case.
Example URL = http://firstname.lastname@example.org&custom1=customval1&custom2=customval2
2) I need to have the same data and the appointment data pass to another page in submit. Instead of a popup like I get now I need it to take me to another page that loads all the existing variables as well as the appointment info as well.