Terminal server temp licenses

Hi,

I am in the process of upgrading (ghosting) all our PCs 50 to XP on my network. Some PCs are presentl;y using Windows 98. We went through a change from Novell to MS 2000 and terminal server in Dec/Jan. We opted to not buy licenses and use the temp terminal server licenses for 98 clients that comes with terminal server. Some of my PC are getting warnings that their license will expire in x days. Is there anyway to reinstate the license until I am able to ghost their PC to XP? One person received a warning 1 day left ….another PC has lost access to terminal server apps.

thanks,
Rob