CCCP installs a lot of components- Haali splitter, VSfilter, FFDShow, Gabest's MPEG2 decoder, CoreWavPack, Gabest's FLV splitter and of course MPC-HC. Out of these, 64 bit version is available for MPC-HC, one for FFDShow is in development, theres one for Haali now as far as i know. Bit the other pieces are not in place yet. VSFilter, i think is not even maintained actively. So unless all these pieces first fall in place, CCCP 64 bit cannot come out.