I suppose it all depends on the a/c movements of that day, and how the ILS system is "wired in" as it were. I should think that it will be done rather rapidly, as the quicker they get it in the more customer airlines will come into LBA.
Also the possibility of PIA bringing in a B772 to LBA means the CAT would have to be upgraded. (BTW this is a rumour that has come through the fire station in regards to shift patterns and RFFS CAT9/CAT10 capability)