Printing comments with BooPrinterVisitor

I want to extend BooPrinterVisitor to print comments for the C# -> Boo conversion.
I have a list of comments with line+column number, and the comment text.
All nodes in the AST carry LexicalInfo representing the location of the node in the C# document.
So basically I want to intercept writing ANY node (or at least any statement) and print all comments up to the line of the statement.
My problem is: Do I really need to override all On...Statement methods?
It would be much easier if DepthFirstVisitor.Visit(INode) was virtual.

So should I make DepthFirstVisitor.Visit virtual? Or override all ...Statement methods (with the risk that future statements are forgotten to be inserted)?
Or is there any other way?

Daniel