overwriting c catchup shortcut in Group buffer

[Stefan Huchler <stefan.huchler@mail.de>]

I try to overwrite the gnus group buffer with some keyboard-shortcuts,
but I dont find the right hook or method to do so.

I want to use direction keys on my home-row instead of the emacs C-f
standard keys or the normal arrow keys and in dvorak the 4 logical keys
under 8 on the right side are c/h/t/n.


(progn
  (defun spiderbit-gnus-group-prepare-setup ()
    "for `gnus-group-prepare'."
    (local-set-key (kbd "c") 'previous-line) 
    (local-set-key (kbd "t") 'next-line)
    (local-set-key (kbd "h") 'backward-char)
    (local-set-key (kbd "n") 'forward-char))
  (add-hook 'gnus-group-prepare-hook
  'spiderbit-gnus-group-prepare-setup))


it worked well with the summary buffer with this hook:

'gnus-summary-mode-hook

but in the Group buffer I cant find the right hook I tried this 3:

'gnus-group-prepare-hook
'gnus-group-menu-hook
'gnus-group-mode-hook

I cant get gnus stop calling the catchup command instead
previous-line. Thanks for your help in advance.