The only strain of the CONDOR HEROES TRILOGY that made it into DOMD was the oblique reference to Au Yeung Fung, which was so oblique, in fact, that you can interpret that as being the legendary West Poison...or a similar, but unrelated character.
Other than that, though, DOMD is completely dissociated from the CONDOR HEROES TRILOGY. If Gwok Jing, Yeung Gor, and Cheung Mo Gei (and their non-historical associates) did not exist, Wai Siu Bo's story would be affected very little (if indeed at all).