Vim keyboard remap on Snow Leopard (MacOs 10.6)

If, according to the question, you already know the mappings, then it's easy..

Home: \033[H  
End: \033[F  
PageUp: \033[5~  
PageDown: \033[6~

Just edit ~/.vimrc and add:

map <Esc>[H <Home>
imap <Esc>[H <Home>
map <Esc>[F <End>
imap <Esc>[F <End>
map <Esc>[5~ <PageUp>
imap <Esc>[5~ <PageUp>
map <Esc>[6~ <PageDown>
imap <Esc>[6~ <PageDown>