Ok, go to line 290, which says:
Create a new line underneath it and add the code:
echo -t $3 -----> Player's chosen box contains: $gettok(%dond.chosenbox,2,58)
So it'll look like:
dond.removebox $4
echo -t $3 Player's chosen box contains: $gettok(%dond.chosenbox,2,58)
msg $dondchan Here are the Boxes left: $dond.getboxes