windows 7 64 language problem

My son has a Asus n53 laptop. Accidently during the first installation of Windows 7 he did not choose en-us language but local ( serbian ). He used to work on english display language. But he has legal Windows 7 home premium and the only way to change language is to make upgrade to windows ultimate or enterprise and it is a expensive solution

I find on the net this:

" you will have to get the appropriate “lp.cab”, i.e. from the Language Pack DVD. Then, type this in a command prompt as Administrator (change path and language code appropriately):

dism /online /add-package /packagepath :\langpacks\en-us\lp.cab

bcdedit /set {current} locale en-US

bcdboot %WinDir% /l en-US

After that, remove the registry folder HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MUI\UILanguages\de-DE.

Reboot

If you get this error: An error occured trying to open d:\en-us\langpacks\lp.cab Error:0×80070003. The System cannot find the path specified

copy the lp.cab to C:\ (the root directory) and run dism from there.

The command line shell must be run as Administrator."

Did someone tried this or did someone have a better solution?

10x

 

Tap F9 at boot and recover the system to factory default settings. Would that bring the language menu back at first boot? I know it works on some laptops/windows installations but not all.