Microsoft has released a hotfix to fix a situation where the English (India) keyboard not listed after you add Rupee supplement to Windows 7.

Assume that you add the Rupee supplement to an English Windows 7 image to support new Indian keyboards that contains Rupee symbols.

In this situation, if the English (India) keyboard is not listed after you select India for the locale during the Windows Setup phase, you can download and apply Fix373143 mentioned in KB2550648.