one thing you can do is use a group and sticky the dir that is the root of all created files.. for example:

mkdir /var/tmp/test
chown youname:mygrp /var/tmp/test
chmod 775 /var/tmp/test
chmod g+s /var/tmp/test
ls -la /var/tmp/test
su - otheruser
touch /var/tmp/test/newfile
ls -la /var/tmp/test
[download]

as long as you set the umask in your script to force 775 for the group you will efectivly own those files...

-Waswas