Hi Guy - I did several colonics before I did a Liver Flush a year ago. A day or two after the flush I did another colonic. This released a lot of old toxins into my colon--more than in any of my previous colonics. If I hadn't done this colon cleansing before and after the flush, the toxins that were dumped into my colon would have probably made me quite ill. Also, the flush wouldn't have been as effective.
I'm glad I followed the advice in Andreas Moritz 's book, and did those colonics before and after the flush. I'm not aware of any alternative to doing them and/or enemas as part of a liver flush. I can understand your reluctance to shove water into yourself from the wrong end (as you put it), but I can assure you it will do you a lot of good for your liver flush.