You probably know most of XP’s useful shortcuts, but did you know that you can make your own to programs? To do this, right click the shortcuts icon of a program (in the desktop or preferably in the start menu) and click Properties.
Select the Shortcut tab and click the Shortcut box. Type Ctrl + Alt + V shortcuts or press V (In this example, were making a shortcut for Netbackup). You can only make Ctrl + Alt shortcuts, by the way(it comes as default even if you didnot press Ctrl + Alt). Press ok and you’re done!

You can carry your favorite computer programs along with all of your bookmarks, settings, email and more with you. Use them on any Windows computer. All without leaving any personal data behind.
PortableApps.com provides a truly open platform that works with any hardware you like (USB flash drive, iPod, portable hard drive, etc). The entire platform is open source built around an open format that any hardware or software provider can use.

 Its is free. It contains no spyware.

http://portableapps.com/suite#download_details

Using autorun, you can set a program to start up automatically when you connect the drive to a computer. You can also use the same script for a data CD-ROM. Note that some computers have autorun disabled for security purposes. [Here's how to disable autorun.]

Open up notepad and paste the following script:

[autorun]

ShellExecute=filename

Label=description

UseAutoPlay=1

Make sure you replace filename with the full path to the file. For example, a file called program.exe in a folder called “programs” on the thumb drive would be /programs/program.exe

Replace description with a short description of the program, for example, My Jukebox or Mozilla Firefox.

Save the file as autorun.inf, making sure you select “All Programs” from the save menu, not “Text document”!

Procedure :
1. Make a folder on the desktop and name it as “folder”
2. Now, open notepad and write ren folder folder.{21EC2020-3AEA-1069-A2DD-08002B30309D} and now (Notepad Menu) File>save as.
3. In the ’save as’ name it as lock.bat and click save ! (Save it on Desktop)
4. Now, again open notepad again and write ren folder.{21EC2020-3AEA-1069-A2DD-08002B30309D} folder and now (Notepad Menu) File>save as.
5. In the ’save as’ name it as key.bat and click save ! (Save it on Desktop)
6. Now, double click lock.bat to lock the folder and now if you open your folder, control panel will open up !
7. Now, double click key.bat to open the folder and now if you open your folder, you can access your data inside the folder again !
8. Lock your folder and hide the key.bat somewhere else on your hard disk !
9. Whenever you want to open your folder just paste the key.bat on desktop and open your folder using it !

Have tried a Operating System inside a browser?
Windows4all.com is a Silverlight based online virtual operating system (sometimes called a Web OS or a Webtop or a cloud computer). It is is a website that simulates an operating system inside your web browser. Windows4all.com replicates the desktop environment of a modern operating system. It can give you a familiar work interface that looks the same whether you’re working at your home computer, or remotely from a borrowed or public computer. You can launch applications right away without installation.
Windows4all.com is web-based and requires Silverlight 3 to operate. Application runs in Silverlight’s security sandbox. By default code is restricted from accessing your file system or doing anything that could hurt your machine. Besides desktop, taskbar, start menu and sidebar, currently it includes such applications:

• File Explorer
• Internet Explorer
• Video Player
• Rich test editor
• RSS reader
• Virtual PC
• Notepad
• Paint
• Chat
• Calculator
• Games like Chess, Solitaire, Spider etc.e

The system also supports installing program functionality.
Windows4all.com advantages:

• Convenience and freedom - A personalized desktop is available and accessible from any computer in the world.
• No more administration - No more software installation, software update, worry about anti-virus.
• Security - Less prone to typical attacks, viruses, worms, vulnerabilities, spyware and disk crashes.
• Hardware - Performance doesn't depend much on the speed of your computer.
• Entertainment - Being online, windows4all.com offers more opportunities for communicating and entertainment.
• Cost - It is free.

go to   http://windows4all.com

Try it !!!!!!!