Creting ISO images of suse installables

Hi,

I am a newbie in Linux.Your help and guidance is required.
I have downloaded suse 9.1 installables,can insatll it through ftp,but what i really want is to create iso images of the installables so that i can burn it to Cd’s and use the Cd’s for installations.I have searched a lot on net but couldn’t find a suitable solution.
Any pointers in how to go about it or path to iso images will also do
Your detailed help in this regard is highly appretiated.

Regards,
Shailesh.