It's common to use checkboxes to allow users to select items instead of opening items. You really need to fix this ASAP; it's nice that you want to accommodate power users, but you've essentially made the site useless to everyone else.
Don't mean to be harsh, but I believe that many people won't have any idea how to open a doc. I'd be willing to help work on an alternative a better design if the aforementioned approach won't work.
