Hmmm, I'm not sure what a central dispatch account is but I suspect it has something to do with freight forwarding.
If you want a GOOD COMPANY to use to ship a car, try BATS! They have a excellent reputation with race car shipments. Talk with Karen Timblin 541-980-5885 http://www.batsmotorsports.com/
Another option that many people have beeen pleased with:
You might try www.uship.com as well... Check the feedback on each carrier, we had a bad experience with one we got shipping your old car from Texas back to Portland, but Uship refunded us their fee because of this, and its just a marketplace for shippers and loads to get together.