I did MCP, MCSE, then MCSA within three months... took about one test a week. I used Transcender and online documentation to get through it all and managed to do it with high scores. I have a LOT of hands-on experience though.
The Transcender tests are good at prepping you for a worst-case scenario test. Transcender is VERY hard... harder than the actual tests. If you can get through the Transcenders, you'll feel kinda silly when the real tests are somewhat easier.