What program created them? Did you look at the files to see if you can extarct the data? You may be able to get it into Excel to modify it and then save as a Text file so some of the common Drawing could import it.

The .Air and .Cor sound like they may be a special format that only the software that created them can use. Could be wrong.

If you could post a sample of each, you might stand a better chance of getting what you need.

Don