If using my hitch you remove four 5/16" sized (metrics thou) bolts , pull off the cross bar, insert the hitch, and replace the bolts. It's that simple & probably takes 15-20 minutes at most.
http://www.venturerider.org/classifieds/showproduct.php?product=3919&title=rsv26amp-3b-rstd-trailer-hitch&cat=24
Larry