WrÅith who wrote the AutoQuote hack has posted a description on how to add those lines when my Markuphack is installed in
this thread which should work just fine.
The new version of my MarkupHack, found in
this thread already includes the conflicting lines so you don't have to bother with part 7 of the instructions for AutoQuote (where the conflicts are). Although the result in the actual posts won't look exactly the same since the markup in MarkupHack doesn't use the new language string in AutoQuote. But that shouldn't matter at all unless you already have posts using the markup from AutoQuote.
Hope this helps.