I know that CodeRush Xpress is intended to be used on VS 2008 and not on VS 2005.
But since I can't migrate to VS2008 yet, I want to install it on VS2005 and don't care it's not supposed to work.
My base assumption is that it can be done, this is based on the fact that the rest of the free re factoring products from DevExpress do work on VS 2005.