Transfer SMS from old Nokia to iPhone through SIM

Hi all,

I need to transfer some important SMSs (text messages) from my old Nokia N73 phone to my new iPhone 3G v2.1. I have been able to copy them onto my SIM card (I am on O2 in the UK) but cannot get these off the SIM and onto the iPhone (although I know there is an option for this for phonebook contacts)?

Is there any way to do this please?

FYI I do not have a Mac, but a PC running Windows XP.