To use a file put it in the subdirectory of $VIMRUNTIME where it
belongs. E.g., the vim.vim syntax file goes into $VIMRUNTIME/syntax
and the vim.vim indent script goes into $VIMRUNTIME/indent.
To find out the value of $VIMRUNTIME use this Vim command:
:echo $VIMRUNTIMEYou can put a file in your own Vim runtime directory (~/.vim), but don't forget to delete it when upgrading Vim!