I have 3 cds of redhat 9.0 source code. I don't know how can i install it to my computer. Last time I use to put the cds in the computer, and it automatically boot up. But this one is the source code. Do I have to compile it. and how can I compile it, Can anyone please help me?

what do you mean? the discs 4, 5, and 6 are the SRPMS ... what exactly are you trying to achieve...

oh, i mean there are 3 cds of a redhat 9.0 source code. and how can i install in my computer.

You might have to get yourself a copy of the first 3 cds to install it.
Well thats how i install rh9.

actually i am going to correct myself....redhat 8 is the one that comes with the SRPMS discs...and there is only 2....so can you show us the discs you are talking about, like the link to the isos you downloaded....cause i am still finding it hard to grasp what you talking about...
i know redhat 9 is 3 discs itself, so maybe your just tricking me by saying 3 cds of redhat source code and maybe your actually talking about the install cds themselves.....so put cd1 in your cdrom and boot your computer up making sure that boot from cdrom is enabled in your bios, or by making it the first boot device...
and if what i just said, is something your already aware of, and your talking about something different, then please do tell otherwise...

red hat 9 has 3 discs of source rpm 5,6,7
4 contains documentations
there are three disks that are used to install the system(rh9) disk-> 1,2,3.
all the rpms that are there on the source disk are in rpm format in the first three disks. you can install packages directly from there.