As wmcclain stated, most upconvert DVD players will only output an HD resolution over HDMI. Meaning your pioneer will only output 480i or 480p over component- essentially without hdmi your pioneer IS AT BEST a progressive scan DVD player.
There is one readily available alternative in the neodigits Helios h4000 (available at costco I believe). It's supposed to be a quality drive but as the above poster suggested the question will really become: is the scaling and/or deinterlacing better in your player or your projector. Best advice is to try it out (obviously buy from a seller with generous return policy).
"For small creatures such as we the vastness is bearable only through love."