Can i create a lake using airport 2.60 for fs2002 so as to land the floatplanes on?

I don't think so...You can create water two ways....sounds like the best way for you is the one I'm least familier with, thou many here will give you detailed help....that is, creating a VTP polygon and calling it water. Do this using a freeware program called ground2k by Christian Fumey.Enjoy,Bob B

You could also try Coastline-maker by Iain Murray. I've used it to change existing lakes and to put in missing lakes. You will also need Cellgrid to prepare the background bitmap you will nedd to work with. Tony