If its jailbroken and u get ifiles from cydia. Lets u add any type of file to ipad and put in the appropriate place. U could upload it to dropbox and use ipad dropbox app n sync. Im not sure if goodreader from app store would wrk. U dont have to be jailbroken to use goodreader.
Goodreader will ftp up and down.
FTPOnTheGo will also, but has less functionality over a wider spectrum, but editing files over FTP it is the best bar none.