XP SP3 RC Build 5508 JPN
まだ55xxか。。
http://www.download.windowsupdate.com/msdownload/update/software/svpk/2008/03/windowsxp-kb936929-sp3-express-x86-jpn_a8b4bd97bf4b11b00ffb96d562c79a90f57d0219.exe
http://www.download.windowsupdate.com/msdownload/update/software/svpk/2008/03/windowsxp-sp3-x86fre-jpn-5508_38354f027b04cfd2141f7a0b2b7313626405679d.psf