Comment / react /quote on shouts

[gijs]

I've set up the shoutbox block to show 'did you know that...' instead of shouts. If people have any news, they just 'shout' it. Works very well.
Only thing that is missing now is that you'd like to be able to comment / react on them. I want to solve this by adding a small react-button to the end of each 'did you know that ...' and link it to a certain topic on the board.

So far no worries, but now I'd like to 'quote' the shout in the post. I thought of adding &shoutnr=.. to the link. But, when I do this and in Post.php want to read that variable by $_REQUEST('shoutnr') it doesn't work... I think that SMF already does something to those values before post.php???

Any ideas would be appreciated. (on how to solve this or on how to quote a shout in a post)