[CentOS] mdadm update

Hi,

I have uptodate x86_64 CentOS 5 with official repositories.
mdadm version is v2.5.4 - 13 October 2006

This version is known to have problems with raid10 configurations.
Sadly, I have a 4 disk raid10 on this system.

I tried adding Dag's repository but system complains about some
packages which are already installed as missing and refuses
to "# yum update"

This box also has some modifications so I do not want to change
repository settings.

I want to update mdadm.

Can I use standalone rpm file for this update?

Thanks.