Installing 5.2-RC2 using USB CDROM failing

[Muthu_T at Dell.com]

All,

   I am trying to install 5.2-RC2 on Dell PowerEdge1655MC using USB
CDROM (TEAC CD-210PU).
BIOS recognizes it and boots it off. I can do disk partition, package
selection everything.
But when I came to the stage of selecting the Media (CD/DVD), it throws
the error saying that
It cannot find any CDROM Drive.

   FreeBSD5.1 Hardware Release Notes says the above USB CDROM supported
by FreeBSD.

can anybody throw light on how to install via USB CDROM?

Thanks.

--T. Muthu Mohan.