first tell us whether u want to make a new cd with English lang or want eng-us added to ur already installed XP if it is first case change ur language in winnt.sif file LanguageGroup=1 SystemLocale="0409" UserLocale="0409" manually add required files if deleted and make new iso as for 2nd option add eng-us lang through control panel\Regional & language option Yes I want to create a new XP cd. I have done what u have instructed but still nlite dont detect the change.Is the change visible only when i'll install this slipstreamed XP? And for the 2nd option only these set of languages are available: Francais(Belgique),Francais(France),Francais(Luxemborg),Francais(Canada),Francais(Monaco) & Francais(Suisse). Thats why i cant change the system language in english. does downloading of english language pack solve the problem? If yes, pls send me the link