If you're trying to create an rpm package from the CrossOver main menu (Bottle > Create Package from "Bottle") and the operation appears to run for a bit before stalling, try installing the rpm-build package from a terminal as follows:
$ sudo yum install rpm-build
Note: Be sure to get the 32-bit rpm-build libs if you're using a 64-bit distro.
Depending on the size of your bottle, package creation can take several minutes.
Other Articles
Why do my CrossOver applications report time a hour faster or slower than my system?
How can I turn off anti-aliased fonts?
How can you map a document type to open in a native application?
How do I map a drive?