If you set a package down if it could check the availeble prims on the property its at and if theres enough availeble rez the contents, give them the instructions and delete the box.
If theres not enough room then tell the person to update the prim count by checking it
out manualy and try again.
as is this can't work because if you try to rez it for them and theres no room its deleted gone forever not even tossed to your lost and found.