If you just want to peek inside that .exe :
Instead of patching an English XP, simply install (full Polish version). Microsoft released official Polish ISOs via VLSC. Look for file names like: pl_windows_xp_professional_with_service_pack_3_x86_cd_vl_x14-73966.iso . windows xp mui pack pl exe
: Thousands of pages of "Help and Support" documentation translated into Polish. Regional Defaults If you just want to peek inside that