The method I use for attaching my camera directly to my HEQ5 mount can be seen here, with photos: http://grelf.net/piggy-back.html#N656258
Please read the rest of my site because I have put lots of hints and tips like that on it. There is also my book, aimed at photographers: http://www.ypdbooks.com/photography/1050-the-dark-skies-of-the-north-pennines-YPD00983.html