LIP stands for Language Interface Pack and this is a way in which major parts of the XP UI is changed to a language for which they do not yet have a full fledged MUI pack. A new LIP for Hindi has been recently released at http://www.microsoft.com/downloads/details.aspx?FamilyID=0db2e8f9-79c4-4625-a07a-0cc1b341be7c&displaylang=h