Way to save all bho before reinstall firefox 4?

Can't get my google pagerank to work on the firefox 4.01 version on my win7home prem PC, I've reinstalled the googletoolbar twice...still, it don't show pagerank info.( I can get pagerank to work fine on my notebook pc running windows XP and firefox 4.01...) So, question is, if I reinstall firefox 4.01...I will lose all my BHO and toolbars right?..Is there a way to avoid that?