There needs to be better instructions man! It took quite awhile to figure out how to use this mod!!
Thread ID - is just that, you make a thread you want to be force read, then enter that threads id # into the thread ID box
Force read order - is the display order I believe
Expire - You can set it to expire on a certain date by checking yes for expire, or you can leave it up indefinately by checking no.
Date - Set the date for expiring if thats what you want
Usergroups - Select which groups have to read the thread (ctrl + click on each name to add multiples)
Location - If you select site wide it will redirect on login. Otherwise you can set the message to a specific forum or sub-forum
Enjoy