How can I send messages to turtles via Rednet while also using a GPS-setup?

He I've got a problem and I just don't know how to fix it:

I got the same setup as described on this page:

http://www.computercraft.info/forums2/index.php?/topic/3088-how-to-guide-gps-global-position-system/

But now, when I try to send messages to my turtles via RedNet, they don't receive them because their already receiving signals from the GPS computers… Is there a way to send the messages anyway, or do I have to think of something else?

What exactly are you doing here? You say you have a GPS cluster set up, and because of that you are unable to send messages to your turtles? lol what? Post your turtle code.

If you meant that you want to use the messages to the turtles using the same PC's that you use for the gps you could just replace your computer for advanced ones(I assume that you are using the less expensive) in that way you can use the 1.6x CC recurse that allow you to multitask, if you want you could replace your startup programs for something like.

shell.openTab("gps host 123 254 15")
shell.openTab("command_sender")

Then the command_sender could send the turtles the message while you still have the GPS setup working just fine.

p.s.: Forgive my english mistakes!