Keila, Don't mind Prae ... he/she is one of our most knowledable people on this forum, and you will always get ALL the info you need from him/her. Pity you only apologised for asking, and didn't thank him for giving you the info.
basically, no matter what visa status you are to begin with, if you adjust status based on marriage to USC, you will need the same set of forms. if you go to the nearest office of US. Department of Homeland security, they will hand you the packet of forms and instructions, and you don't have to think or worry about missing anything.
but Praetorian gave all the form numbers that your friend will need. THANK YOU PRAE!
Travel: your friend can only travel once he/she is granted AP = Advance Parole = Travel permit, or the greencard itself. That process is min 2-3 months long.