C50LE - "send host-name" with DHCP

C50LE - "send host-name" with DHCP

Hi there, I was looking to have my new Wyse C50LE clients' host name appear in DNS / DHCP when they acquire an IP. I thought I would simply be able to edit the /etc/dhclient.conf file and un-comment the "send host-name" line, but that doesn't seem to be a case. Is there an alternate method I can use from the client itself? I'm hoping to avoid setting reservations on my DHCP servers if possible. 

Thanks,

Scott