I have both x64 and x86 RTM 7600 langpacks in .cab format and windows 7 installs them just fine. Also easy to integrate with DISM: Code: dism /Image:"mounted wim path here but without quotemarks" /Add-Package /PackagePath:"languagepack .cab path here but without quotemarks"
Code: dism /mount-wim /wimfile:path to install.wim /index:1-5 /mountdir:path to mountfolder dism /image:path to mountfolder /add-package /packagepath:pah to lp.cab dism /unmount-wim /mountdir:path to mountfolder /commit That would be complete commandlist to execute