[root@box2 root]# rpm -Uhv yum*
warning: yum-2.2.0-1.src.rpm: V3 DSA signature: NOKEY, key ID 69886cc7
warning: user skvidal does not exist - using root
warning: group skvidal does not exist - using root
warning: user skvidal does not exist - using root
warning: group skvidal does not exist - using root

and then:

[root@box2 root]# yum
-bash: /usr/bin/yum: No such file or directory