RT Se7en Lite is a tool for Windows 7, By using this application, you can modify the Windows 7 disk for use. 

Using RT Se7en Lite  you can customize Windows 7 ISO, according to your needs you can remove unneeded features of windows 7.
It allows you to language packs, applications, Remove Components, Enable/Disable features, add Icons, Wallpapers, Themes, Unattended Setup settings, and create a Bootable ISO image etc.

It supports 32 and 64 bit version of Windows 7

Download RT Se7en Lite 

[Requires .NET Framework 3.5]