do you mean for all pages or just for specific pages if for all pages you may want to search for the ultimate side colums hack by kerry-anne, there's also a vertical site navigation hack by kerry-anne too.
if it's for a specific page there's hack called side column left for forumhome and you can manually place it on the pages you'd like it to show on.
a little more info on what you'd like it to do would be nice