Try this
code:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
"Winamp"="C:\\Program Files\\Winamp\\winamp.exe"
Its the same as what is attached .reg file what -dt- posted showed that winamp folder as "Program Files\winamp" but for me its "Program Files\Winamp" Hope this works for you. But if you know how to copy and past a shortcut from ur start menu it woudl be better go to "Start|Programs|Winamp" then right click Winamp and click copy then go to "Start|Programs|Startup" Thrn right click the Startup folder and click past and that would work also