Do,
I don't know if you still care, but I think I may have found your driver. I don't have a Xentera (yet) but wasn't about to buy one if I couldn't use it.
I found two sources for the two pieces of Xentera software I was interested in. Ultimately I got both via the Wayback Machine, web.archive.org, which is one of the coolest things on the planet for trying to research dead or changed websites.
I looked at
http://www.colorgraphic.net on the Wayback machine, moved back in time until the product download page for the Xentera GT was really there. I was able to download the Mover utility directly from there. Here's the link on Wayback:
http://replay.waybackmachine.org/20050203173908/http://www.colorgraphic.net/newsite/products/xentera_gt_downloads.asp
Click on "Mover version 2.52" to download that.
Unfortunately I couldn't get the driver this way. I was doing other searches on Google and found that download.cnet.com had the drivers! Well, not really. They have downloads available, but they all lead to the dead colorgraphic.net website. But I copied that URL and tried it in the Wayback Machine, and it downloaded the driver zip file. It sure looks like a driver when I look inside the zip, and it also has the SetArray utility in it. I forget what I read that's for, but there's a help file for it so it should be easy to figure out. The driver link on the Wayback Machine is:
http://waybackmachine.org/*/http://www.colorgraphic.net/newsite/downloads/drivers/win_2000/80510R3.zip.
Hope this helps. If these links don't work for you I can send these to you some other way.
Adam