Mark Horninger , A+, Net+, Security+, MCSE+I, MCSD, MCAD,MCDBA, MCTS, MCITP, MCPD is President and founder of Haverford Consultants Inc.( http://www.haverford-consultants.com/ ), located in the suburbs of Philadelphia, PA. He develops custom applications and system engineering solutions, specializing primarily in Microsoft operating systems and Microsoft BackOffice products. He is also an adjunct professor at Kaplan University in the Web department. He has over 15 years of computer consulting experience and has passed 50+ Microsoft Certified Exams. During his career Mark has worked on many extensive and diverse projects including database development, application development, training, embedded systems development and Windows NT and 200x project rollout planning and implementations. Mark lives with his wife Debbie and two children in Havertown, PA. He is the author of Configuring and Troubleshooting Windows XP Professional MCSE Windows 2000 Professional Study Guide and Designing SQL Server 2000 Databases for .NET Enterprise Servers.