merd...ho modificato il file fedora-devel.repo mettendo enabled a 1, ma niente...
codice:
[root@localhost dd_rescue]# yum install dd_rescue.i386
Setting up Install Process
Setting up repositories
development               100% |=========================| 1.1 kB    00:00
updates-released          100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
base                      100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 1.0 MB    00:06
developmen: ################################################## 3732/3732
Added 3732 new packages, deleted 0 old in 23.39 seconds
Parsing package install arguments
No Match for argument: dd_rescue.i386
Nothing to do
[root@localhost dd_rescue]# dd_rhelp /dev/sdf1 /mnt/win1/text.img
Bad version of dd_rescue ! you must have >= 1.03
da qua non posso installare una versione più recente?

(per fortuna ci sei te..)