I would like to add the necessary beacons and stuff to enable ILS approaches at Hamilton AFB in the SanFran region. Is this something that I can do with FLED, or is it more complex ?Chris Low.

In FLED, Options menu->Place Beacons. Choose ILS then click on the map where you want it to go. Edit Heading until it matches the runway.You may have to fly a couple of approaches to make sure you end up in the right place but if you place the beacon at the touchdown marks on the runway you should be OK.

Also double click on airport icon - ILS flag there. And don't forget to add glideslope and localisers, and OM and IM - all within FLED. Typical distances and locations are given in the FU2 manual.