Good point. Take a look at this post that talks about more ways to resolve MS10-046 on machines running XP SP2

forum.maas360.com/.../ms10046-timing-is-everything-for-xpsp2

This patch (listed as for XP Embedded only) actually works on any XP SP2 system: www.microsoft.com/.../details.aspx

Thanks to blog.securityactive.co.uk/.../patching-windows-xp-sp2-for-the-shortcut-lnk-vulnerability-ms10-046 for reporting this.