VIM Auto Complete Navigation

I've disabled the arrow keys on my .vimrc, but...

How do 开发者_开发问答I navigate up and down in autocomplete pop-ups? j and k doesn't work as I am in the Insert mode.

You can use ctrl+n and ctrl+p (which are conveniently close to everything else). Incidentally, these also work in bash and other useful places, so are good to get used to.

You may also like other popupmenu commands: http://vimdoc.sourceforge.net/htmldoc/insert.html#popupmenu-keys