Decreasing Boot Time

Microsoft has made available a program to analyze and decrease the time it takes to boot to WindowsXP
The program is download from http://www.onecomputerguy.com/software/bootvis.exe
Uncompress the file.
Run BOOTVIS.EXE
For a starting point, run Trace / Next Boot + Driver Delays
This will reboot your computer and provide a benchmark
After the reboot, BootVis will take a minute or two to show graphs of your system startup.
Note how much time it takes for your system to load (click on the red vertical line)
Then run Trace / Optimize System
Re-Run the Next Boot + Drive Delays
Note how much the time has decreased
Mine went from approximately 39 to 30 seconds.
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WindowsXP Command Line Utilities

While there are a lot of command line utilities in WindowsXP, here are some that I have been using lately.

bootcfg - Configures, queries, or changes Boot.ini file settings.

driverquery - Displays a list of all installed device drivers and their properties.

getmac - Returns the media access control (MAC) address and list of network protocols associated with each address for all network cards in each computer

gpresult - Displays Group Policy settings and Resultant Set of Policy (RSOP) for a user or a computer

netsh - You can use commands in the Netsh Interface IP context to configure the TCP/IP protocol

schtasks - Schedules commands and programs to run periodically or at a specific time

systeminfo - Displays detailed configuration information about a computer and its operating system