Basically, EquipmentRequest needs to know what to do with pseudo-slots FOLDER1 - FOLDER5. It will be an "inv_use.php" request on the folder holder, which will redirect to choice.php, followed up by submitting choice.php with appropriate parameters to add or remove a particular folder. So, in other words, when the response (to the "inv_use.php" request) comes back to EquipmentRequest, for a FOLDER request, look at the response, make sure it is the expected choice.php (given automatic redirection; otherwise, do the redirection yourself), and submit the request to actually do the work.I haven't figured out how to work with that code yet, and mafia certainly has no idea how to change folders.
It's new territory for EquipmentRequest, but I suspect it is not difficult.
I'm going to do The Sea (as a SA) today and ascend. I'll do it again (as a PM) on Sunday and then again (as a DB) on Wednesday, at which point I will try out KOLHS for the first time and will be able to look at this myself, if you haven't gotten to it yourself by then.