If you have purchased Windows Vista online and taken the delivery of the latest operating system via Web download from Windows Marketplace, you would end up with a few downloads with .wim and .exe file extensions. Rather than paying additional shipping and handling charges, you can burn or create a bootable ISO DVD image from downloaded Vista files with the following trick, where the .iso image can subsequently write to a DVD. The DVD created will be the typical 32-bit Windows Vista DVD that available in retail channel, and can be used to clean install.

How to make a bootable Windows Vista ISO DVD media

1. Put all 3 downloaded files (namely install.wim, boot.wim and an executable X13-49120.exe) in the same folder.
2. Run the X13-49120.exe executable. Windows Vista Setup Preparation will create a new folder “Vista” inside the folder and will populate the folder with all necessary Vista setup files which takes up about 2.52 GB disk space.
3. Exit from the Install Windows screen.
4. Download CDimage 2.52.
5. Extract CDimage to the C:\ root directory.
6. Open a command prompt shell, and run the following command:cdimage.exe -lVISTA_EN_DVD -m -u2 -bC:\Vista\boot\etfsboot.com C:\Vista\ C:\Vistax86.iso

   Bootable Windows Vista x86 DVD ISO image in UDF format will be created as vistax86.iso in C:\ or any folder you specified above.

7. Burn the newly created ISO with a CD/DVD burning software. 

Create a Windows Vista ISO image and DVD with Oscdimg

Another possible way to create a bootable Vista ISO and DVD is by using Oscdimg CD-ROM and DVD-ROM Premastering Utility, available via WinPE (Windows Preinstallation Environment) via Business Desktop Deployment 2007 or Windows Automated Installation Kit (AIK)

1. Follow the above step 1 - 3.
2. In the command prompt window, run the following command:oscdimg -bC:\Vista\boot\etfsboot.com -h -u2 -m -lVISTA_EN_DVD C:\Vista\ C:\VistaDVD.iso

   A VistaDVD.isoUDF DVD image will be created and can be used to boot the computer from DVD to install Vista.

3. Burn the ISO image file.