Gotchas:

1) dealing with the database restore was a pita, i found that from several failed attempts setup had created extra engine databases. I had to use engine-clean to wipe as much as possible, then manually delete all the engine-* and engine databases, then do engine-setup to create a new database, grep the config for the db password, engine-clean to wipe everything (removes all data but leaves empty database) then do a restore using the password from the grep step.

2) http SSL was bad; FC used a different SSL config from centos, and this seemed to be reproduced by engine-setup causing failures during setup.  The http error was around SSLPassPhraseDialog, in FC: SSLPassPhraseDialog exec:/usr/libexec/httpd-ssl-pass-dialog

in centos: 

This caused engine-setup to fail and http not to start.