I've created a Post XP SP3 Update Pack which includes all updates (to date) after Windows XP SP3 was released.
I have tested this on Windows XP Home and Professional SP3. You can either install XP SP3 from new using a slipstreamed method, or install SP3 on top of an existing installation.
Once you're running XP SP3, you can download and install my update pack which you can download here.
The pack includes:
Internet Explorer 7
Media Player 11
.NET Framework 1.1, 2.0 and 3.0 (including service packs)
Adobe Flash 22.214.171.124
Adobe Shockwave 126.96.36.1998
All post SP3 hotfixes (upto July 2008)
The download will extract all updates into the C:\Hotfixes directory. A command prompt window will appear informing you what's being installed. You'll be prompted to restart your computer once complete.
After you've restarted your computer, navigate to C:\Hotfixes\IE Update and run the update manually. Once complete, you can safely delete the C:\Hotfixes directory.
Any feedback would be much appreciated. Although I could of included .NET Framework 3.5, this itself is 200MB in size. And I don't know of any applications yet which require .NET Framework 3.5.
If you're wondering why I've included Adobe Flash and Adobe Shockwave, it's because XP SP3 comes complete with a vulnerable version of Flash. I included Shockwave because it's a commonly used Plugin too.