Additional package not in ISO-image

Hi, I added an additional package into a newly created i386-folder and have run the create_package_descr as described. The package identifies itself as i386-arch. The problem is that the file is not added to the ISO-image, from which I would like to install the target-system. I found that an earlier version of the package that I created (compiled and packaged) on this system is found in every packages-file that has been created by create_package_descr. That means that there is the same package with 2 different version numbers in the packages files. Is this the cause for the malfunction? How can I get the additional package integrated into the ISO-file? Thanks Silvério Santos