Hi Darren,
Suppose that this is the original config you have now:
object network OBJ_SPECIFIC_192-168-1-0
subnet 192.168.1.0 255.255.255.0
If you do the following, then the NAT rules associated with this object will still remain intact:
conf t
object network OBJ_SPECIFIC_192-168-1-0
subnet/host _____________
However if you remove the object and recreate it, then the nat rules will be deleted.
Hope this helps.
P.S.: Please mark the question resolved, if it has been answered. Do rate helpful posts. Thanks.