Thanks to
Doc McBlzr for this info:
How to Create a Single x86 and x64 Windows 7 Installation DVD
Things you need:
1) ImageX tool =
Deposit Files
2) Windows Windows 7 x86 and Windows Windows 7 x64 DVDs Or ISOs. ( I used MSDN Official releases which included Starter x86)
3) Ultra ISO or power ISO.
So Let us start:
1) Make two folders, say "64bit" and "Allbit" and copy both Windows 7 DVDs x64 and x86 versions respective folder(I am keeping the folders in "D:" drive).
2) Now open an elevated command prompt and go to the folder where you have kept imagex.exe.
3) Now run the following commands with appropriate INDEX no. to exports a copy of the specified image to another install.wim file. (From "64bit" folder to "ALLbit" folder).
3.1) Imagex.exe /export D:\64bit\Sources\install.wim 1 D:\Allbit\Sources\install.wim "Windows 7 HOMEBASIC x64"
3.2) Imagex.exe /export D:\64bit\Sources\install.wim 2 D:\Allbit\Sources\install.wim "Windows 7 HOMEPREMIUM x64"
3.3) Imagex.exe /export D:\64bit\Sources\install.wim 3 D:\Allbit\Sources\install.wim "Windows 7 PROFESSIONAL x64"
3.4) Imagex.exe /export D:\64bit\Sources\install.wim 4 D:\Allbit\Sources\install.wim "Windows 7 ULTIMATE x64"
4) After running of above commands "Allbit" folder`s install.wim file will be the universal WIM file that contains all version of Windows 7(both x64 and x86) . But you can also export any your desired versions only.
5)Open the Windows 7 x86bit ISO image with UltraISO, delete all the files inside it, then drag "Allbit" folder contents to the ISO please check if the file "ei.cfg" exist in the "sources" folder or not if the file exists then delete it and save ISO anywhere you want. Now burn it and install.
Now you got a single DVD for Windows 7 with all versions of both 32bit & 64bit which takes more or less 4GB.