Boom already has her K-1 Fiancée VISA. She is already legally in-country.
Now she needs to apply for Conditional Permanent Resident status via form
I-485 (see page 7 of the attached I-129 Instructions)
http://www.uscis.gov/i-485 , then (15 months later) a form I-751. The form
485 link is here...
http://www.uscis.gov/sites/default/files/files/form/i-485.pdf it needs to be
(should be) filled out online, I think, but I attached the form so they can
fill it out properly first. Any questions...call / text . They need to
make sure they get it right the first time ;) .