If you want to do your own conversions there is an 'OCAD converter tutorial' on the CF website. Also an even more useful OCAD converter guide' in the CF library. If you can't find this I can send it if you leave your email in the comments for this race.
Looked at the instructions on website before and couldnt make them work and cant get that file to download from the library
bullvei@gmail.com if you want to send it over and see if I can understand :)