[Orgmode] jumping to category

[Richard G Riley]

I have

 (setq org-remember-templates
   (quote (
           (?t "* TODO %?\n  %u\n %i\n %a\n" "~/org/todo.org" "Tasks")
           (?n "* %U %?" "~/org/notes.org" "Notes")
           (?f "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "FaceBook")
           (?l "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "Linux")
           (?e "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "Emacs")
           (?v "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "Vocab")
           (?R "* %U %^{Title}\n %i\n %a\n" "~/org/register.org" "Register")
           (?r "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "Remember")
           (?j "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "Journal")
           (?L "* %U %^{Title}\n %i\n %a\n" "~/org/todo.org" "Links")
           )
          )

where register.org is a list of personal stuff including passwords etc
so I have it protected with different file permissions to the normal
todo.org file.

Whats the best way to get to register.org from my agenda or my general
todo.org file? is there some built in "jump to other org file" utility I can
customise similar to one key tag commands?