This is a very useful all-in-one computer performance and speed enhancing program. The interface is simple and easy to use, and it has basically everything you need to speed up your computer. It includes: defragging, registry cleaner, disc cleanup, repair wizard and much more. This definitely helped to speed up my pc and freed up a lot of hard disk space.

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The differences are not very big and casual home users will find XP Home Edition sufficient.
Windows XP Professional Edition has the following differences:
Administrative Tools in the Start Menu and Control Panel
Automated System Recovery
Boot Configuration Manager
DriverQuery
Group Policy Refresh Utility
Multi-lingual User Interface (MUI) add-on
NTFS Encryption Utilitiy
Offline Files and Folders
OpenFiles
Performance Log Manager
Remote Desktop
Scheduled Tasks Console
Security Template Utility
Taskkill
Tasklist
Telnet Administrator
XP professional also provides support for multi-processor systems (several CPUs), Dynamic Disks and Fax.
More Cool Windows XP tips & tricks HERE

This is very easy and gives your PC a customized look.
1. Fire up Paint from Start-All Programs-Accessories.
2. Press Ctrl + E and set the image size to 32 x 32 px.
3. Draw your icon or minimize a picture
4. Save as filename.ico
5. Right-click on a folder and open the properties window. Click on the customize tab an the Choose Picture button and locate your icon.
More Cool Windows XP tips & tricks HERE