This function allows you to modify the numeric contents of a location. The changeable elements are : HI and LO - set the allowed level ranges to enter or train. VI can reset the number of visits while SP modifies the special setting. EV and ED are used to drive events *help events goes into a lot of detail on this. TR and RA control traffic rate and random creature list. OB and CR allow you to manage and manipulate the perm creatures, for both, when displayed, Ival is the base repop duration and Rval is the remaining before it repops again. If 0 then its already there.