Windows box:

Windows box:

Windows box:
To change the About Windows box you'll have to change 2 things:
The BITMAP file and the text of box saying Windows XP.

Download the required BITMAP file from here:
Download About BMP
Mirror
Open "%windir%\System32\Shell32.dll" file in Resource Hacker and then replace following BITMAPs with the downloaded BMP file:
Bitmap -> 131 -> 1033 (For XP Professional)
Bitmap -> 147 -> 1033 (For XP Home)
Now open %windir%\System32\msgina.dll file in Resource Hacker and then replace following BITMAPs with the downloaded BMP file:
Bitmap -> 101 -> 1033 (For XP Professional)
Bitmap -> 107 -> 1033 (For XP Professional)
Bitmap -> 128 -> 1033 (For XP Home)
Bitmap -> 129 -> 1033 (For XP Home)
Now to change the text of dialog box, open "%windir%\System32\xpsp1res.dll" file in Resource Hacker and then goto:
Dialog -> 14352 -> 1033
Now replace the existing code in right-side pane with the code in following file:
about_dialog_box_code.txt
Click on Compile Script button and save the file.
11. System Properties dialog box:
To change the System Properties dialog box, you can follow this tut:
Hacking System Properties Dialog Box (Sysdm.cpl file) in Windows XP
12. Windows Classic Startmenu Leftside Image and Start button Logo:
To change them first download required BMP files from here:
Download Startmenu and Start button BMP
Mirror
After extracting the BMP files, open %windir%\Explorer.exe file in Resource Hacker and then replace following BITMAPs with the mentioned BMP files:
Bitmap -> 166 -> 1033 with 1.bmp (For XP Home)
Bitmap -> 167 -> 1033 with 1.bmp (For XP Professional)
Bitmap -> 176 -> 1033 with 2.bmp
13. A few other mods:
1. Windows Vista shows the "View" menu on desktop too, you can also enable it in XP using following tut:
How to enable "VIEW" Menu on Desktop in Windows XP

2. Windows Vista's All Programs menu is different from XP, you can follow following tut to make ur XP Programs menu similar to Vista:
Change Look-n-Feel of Windows XP Start Menu
Open regedit and goto:

HKEY_USERS\.DEFAULT\Control Panel\Desktop

In right-side pane change the value of Wallpaper String value to the Path of downloaded BMP file. e.g., if you saved the BMP file at "D:\Startup.bmp", then set the value of Wallpaper to D:\Startup.bmp. Now you'll get a similar Vista Logo just before the Login screen in XP too.
4. In Windows Vista explorer, A small horizontal progress bar is displayed under each drive icon showing the filled/remaining space in the drive.

You can also do the same in XP by using a 3rd party utility:
Download Vista Drive Icon
Just run the file and it'll add the progress bar in each drive.
5. In Windows Vista explorer, we get Bread Crumbs in addressbar which is quite useful. You can also get the same feature in Windows XP using "QT Addressbar":
QT Addressbar: Windows Vista Addressbar Clone for Windows XP
6. Windows Vista also contains a Sidebar, which is displayed on right-side on desktop (by default and can be changed to be displayed at left-side). You can also use a sidebar in XP. Just download it from here.
7. If you have any problem with Resource Hacker and want to know about it, then please go through following tuts:
All About Resource Hacker in a Brief Tutorial
List of Files to be hacked using Resource Hacker
List of a few Locations in Windows XP System Files to be Hacked using Resource Hacker
8. If you get error while saving the system files, then its happening because of the WFP (Windows File Protection) service, which can be disabled using WFP Patcher or you can use Replacer to replace system files with ur hacked ones. You can get all these utilities from following topic:
List of Some Useful System Utilities!
Thats all for now guys. If you have more suggestions then please post them.
Remember this tutorial is for doing the task manually and not using the transformation packs.