I'm using RHEL4 and i want to create a bootable cd in linux for QNX os, i've got the qnx.zip file from our customer, i have uploaded the file in to linux server and unzipped it.

I've tried creating a ISO file with mkisofs command and then writing the ISO file to cd using cdrecord command and after doing all this when i insert the cd in another machine and try to boot from cd i was unable to boot from it, i've checked the Bios and every thing is normal.

Is there any other way to create a bootable image and burn it to cd in linux.

Please let me know how to proceed...

What's inside of this qnx.zip archive? In general, you need a bootable image included in a specific way into your ISO file to make it bootable. You can see the general process described here, for example.
http://linuxgazette.net/issue85/sipos.html

I am not sure what all dose it has, it has BOOT folder,INSTALL-script and some other content's. My problem here is is i want to burn the CD for installing it on another system, I have to burn the CD from the QNX zip which i've received. I am able to make ISO image and then burn it to CD, but when i try to install QNX from the Cd which was burned, its unable to boot from CD.

I've created iso image as below,

mkisofs -r -o /Mydirectory/Filename.iso /Source directory of unzipped QNX/

After that i've burned it to Rewiretable CD as below,

cdrecord -v -eject speed=16 dev=ATA:0,0,0 /Mydirectiry/Filename.iso

It was burned properly and i'm able to see the contents in the CD by inserting in my XP machine, but when i try to install in new system i am unable to Boot from the CD.

Let me what can i do...???

To make a bootable CD, you need a bootable image somewhere in your qnx archive. It's a file either 1.44 or 2.88 MB. The size is standard. Without knowing the content of your archive I can't even tell you where to look, the only thing certain is the size. Once you located it, you point the mkisofs program to it when creating an ISO image, like this

mkisofs -b bootimage.img <some_other_stuff>

Without this bootable image there's no way to make your CD bootable. The link I gave you pretty much explains everything else involved. But the crucial part is either you locate the image in your archive, or you make your own. Again, the link I gave you explains where you can get such images.
http://linuxgazette.net/issue85/sipos.html

My archive has the below content in it,

total 1784
-rw-r--r-- 1 root root 174 Aug 3 2007 POINTING.GIF
-rw-r--r-- 1 root root 1834 Aug 3 2007 CAUTION.GIF
-rw-r--r-- 1 root root 1474560 Aug 3 2007 INSTFLOP.DAT
-rw-r--r-- 1 root root 263501 Sep 6 2007 REL_6_3_2.HTML
-rw-r--r-- 1 root root 10776 Sep 6 2007 INSTALL2
-rw-r--r-- 1 root root 23987 Sep 6 2007 INST_6_3_2_NEUTRINO.HTML
-rw-r--r-- 1 root root 359 Sep 7 2007 README.TXT
-rw-r--r-- 1 root root 816 Sep 7 2007 README.HTML
-rw-r--r-- 1 root root 1268 Sep 7 2007 CHECKSUM.TXT
drwxr-xr-x 3 root root 4096 Jan 5 13:42 BOOT
drwxr-xr-x 2 root root 4096 Jan 5 13:42 NOTES
drwxr-xr-x 5 root root 4096 Jan 5 13:42 LICENSING
drwxr-xr-x 2 root root 4096 Jan 5 13:44 REPOSITORY
drwxr-xr-x 2 root root 4096 Jan 5 13:44 UTILITIES
====================================================================
In Detail it has,

.
./BOOT
./BOOT/FS
./BOOT/FS/QNXBASE.IFS
./BOOT/FS/QNXBASE.QFS
./BOOT/FS/QNXBASEDMA.IFS
./BOOT/FS/QNXBASESMP.IFS
./BOOT/ISOCATALOG
./CAUTION.GIF
./CHECKSUM.TXT
./INST_6_3_2_NEUTRINO.HTML
./INSTALL2
./INSTFLOP.DAT
./LICENSING
./LICENSING/CSLA
./LICENSING/CSLA/LICENSECOMMERCIAL.TXT
./LICENSING/LICENSE_GUIDE.PDF
./LICENSING/NCSLA
./LICENSING/NCSLA/LICENSENONCOMMERCIAL.TXT
./LICENSING/PSLA
./LICENSING/PSLA/LICENSEPARTNER.TXT
./LICENSING/THIRD_PARTY_TERMS_LIST.PDF
./NOTES
./NOTES/CAUTION.GIF
./NOTES/INST_6_3_2_LINUX.HTML
./NOTES/INST_6_3_2_LINUX_X86.HTML
./NOTES/INST_6_3_2_NEUTRINO.HTML
./NOTES/INST_6_3_2_NEUTRINO_X86.HTML
./NOTES/INST_6_3_2_WINDOWS.HTML
./NOTES/INST_6_3_2_WINDOWS_X86.HTML
./NOTES/POINTING.GIF
./NOTES/REL_6_3_2.HTML
./POINTING.GIF
./README.HTML
./README.TXT
./REL_6_3_2.HTML
./REPOSITORY
./REPOSITORY/QNX6_HOST.TARX
./REPOSITORY/QNX6_QDE.TARX
./REPOSITORY/QNX6_TARGET.TARX
./REPOSITORY/QNX6_TARGET_GPL.TARX
./UTILITIES
========================================================================

There is no *.img file in the archive.

How can i proceed now...To be clear let me know what i was trying to do,

I want to burn the CD so that i can use that CD to install QNX in new system. To achive it i am creating a ISO file with mksiofs and burning it to CD using cdrecord and then i am trying to install the QNX in new system using that CD..

Well, did you try reading those README and INST_6_3_2_LINUX.HTML files in your archive? They might hold a key...

Ya i've tried reading it but no use it only says how to install the QNX,But my problem here is that i am unable to boot from the CD which i've created in LInux and burned it.....

I've want to know the exact command of burning the ISO image created in linux as bootable.....

Any help would be appriciated....