Renaming workstation after WDS image?

All,

Just finished setting up my WDS server to image XP workstations. I created a
sysprep.inf unattended file, syspreped the machine and captured, then imaged
the machine. Everything worked out fine, except to rename the machine to
"mycompany-XXX". I set the properties in WDS to set the format of the
renaming to the correct syntax "mycompany-%03#" but every time I image up a
workstation, it would give me "mycompa-ANXB" or something like that.
Is my sysprep.inf incorrect? I set the "ComputerName=*" Shouldn't WDS be
doing this correctly?

Also, I set in WDS to join the workstation to a certain folder object in AD
but it still puts it in the "Computers" object by default.

Thanks for any info!