How to dock modification peptide by haddock

The HADDOCK category is meant to discuss any HADDOCK-related issue. For general information about HADDOCK refer to
I want to dock peptides that have modification like 2-aminobenzoyl, acetamidomethyl, 2-abz, Acm by haddock but I could not find this modification in haddock list . would you mind helping me how I can dock these peptides with haddock?

These are not supported … no simple way to do it