Hey guys im trying to alter the input sections on the billing form and cant find the correct files, can anyone point me in the right direction?

http://1036835857.9350300.temp.prosi...ain_page=login

Thats the site/page

I need to add MRS to the Mr, Ms section
I need to change State/Province to County as well :)

Any input would be super!
Thanks in advance

Eddy