Creating terminal windows and executing . . .

HI and thanks for reading,

I'm fairly new to c programming and I'm hung up.

I have a c program written in Red Hat 7.2 and I would like that program to open a new terminal window and run a program in that new terminal window.

Does anybody have an idea how I could do this?
Thanks

And...ehm...I would like to program Doom3, Anyone know how
to do this?

I hope you got my point, You can't just ask for a program without
give any info,done work,specs etc.