Customize START button

First you need a tool called "Resource Hacker".
 This free program allows you to change resources in any .exe file such as "Explorer.exe", which includes the [Start] button's Label. You can visit Download.com and search there for "Resource Hacker".
After you download it, follow the guide here:

Step 1:

A - Run "Resource Hacker" and open the file
 "%windir%\Explorer.exe".
B - You see a Tree of all Resources in this file,
 expand the "String Table"
C - Find the "start" and replace it with your own
 text. then press the [Compile Script] button.
D - Save "Explorer.exe" as "MyStart.exe"
DONT save it as Explorer.exe, do "save as.."
 and give it a new name.
E - Quit "Resource Hacker".

Step 2:

A - Click on the [Start] button and choose the
 "Run..." item from the start menu.
(Or use the shortcut key WinKey+R)
B - Type "RegEdit" in the Run "Dialog Box".
 And then press the [Ok] buton to run the
"Registry Editor" program.
C - Go to: "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon"
and find the "Shell" property.
D - Replace value of the "Shell" property to
 "MyStart.exe".
E - Quit "Registry Editor".
F - Restart your system.

Note about Registry Editor:
if you did not find the key
"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon", you can search the Registry for the "Explorer.exe", to do this use the Edit Menu | Find Next (Ctrl+F).


AmirBehzad Eslami's site has a handy tool for
altering your start button, which makes life much
 easier, you can find his site here:
h**p://www.startbtn.main-page.com