Adding language pack after XP Service Pack 3

I work at a school with a laptop program. All students have a laptop. Some students take Mandarin and we have to load the Asian languages to XP.

The problem we are having now is, we updated our XP – Sp2 to Service Pack 3. Now when we go to add the Languages it asks for Windows XP with SP 3 CD. We only have Windows XP w/ SP2 CDs and we used the download of SP3 for the update.

I downloaded the ISO for SP3 but that does us no good because it wants the CD that has Windows XP w/ SP3.

Please help. Has anyone else had this issue, or know how to get around this?