Unfortunately you might almost certainly need the Windows XP CD, and since anything that has got to do with piracy and/or unauthorised distribution of copyrighted material(s) is deeply frowned upon, I'm afraid your only recourse is to get a Windows XP CD.

http://www.microsoft.com/globaldev/handson...xpintlsupp.mspx

Third party software like Chinese Star, NJStar would also fix the 'those squares and lines' but it's not free.

The following links are excellent resources for Chinese word processing in Windows. No CD required.
http://mailer.fsu.edu/~flan/chinese/docume..._processing.htm
http://newton.uor.edu/Departments&Programs...china-comp.html

Hope it helps.