Is it possible to add ILS to an airport?

I dont know exactly but i am sure with some freeware aiport design programmes, u can add ILS frequencies to the airports that you are building. The thing is there might be one that allows you to edit it the other airports already available in the Flight simulator, therefore given you a resolution for your problem. Someone will have to let you know, however, weither or not this is possible, as i say i dont know.

I guess my question is why do you want to make an airport ILS if it isn't? There are plenty that are and for the sake of realism I wouldn't want to make that change unless the airport in question should be ILS but isn't.

You can add ILS to airports that dont have it already
You will need a program called Afcad2

With this program you can create new airports,increase the parking areas to airports already there,add specific parking,add ils,ndbs and loads more ➡

https://flyawaysimulation.com/downloads/files/1232/afcad-221-for-fs2004/

Additionally you might want to check out Rwy 12. They seem to be doing anything and everything that has to do with airports. ➡ http://www.rwy12.com/rwy12/

OK thanks for the links guys, I'll check it out later.

BTW, the reason for adding an ILS to my local airport is because they are increasing the runway length in a year or two and a ILS system will obviously be installed to combat the ever-annoying problems of fog that constantly delays planes to other aiports.