Done this (exams only never did the training) a while back I was actually one of the founder members (or whatever they're called - basically one of the first 1,000 people to pass it).
It consists of two exams:
70-271 - Supporting Users and Troubleshooting a Microsoft Windows XP Operating System
70-272 - Supporting Users and Troubleshooting Desktop Applications on a Microsoft Windows XP Operating System
Full information about the exams can be found here:
http://www.microsoft.com/learning/mcp/mcdst/requirements.mspx
You will need to know about the Active Directory, IP Addressing, DHCP, DNS, Domains all to a low to competent level.
It also is an exam towards the MCSA as well.
I'd just google a company who provide and do the training. To book the exams you need to register with Prometric (
www.prometric.com) though I'm sure your training provider can give you better hints - infact some include the exams during the training.
.Kencs is correct in the fact that you do get two books. These have trial versions of the stuff you will have been studying and contary to what .Kencs says they do have pictures in them. Basically they're great reference materials.
I'd say go for it.
M.
Edited for proper exam titles and links.