How do I safeguard and share my SMS&MMS from my Nokia 5320 (S60)?

I keep some folders on my phone for my interesting conversations with particular people, which sometimes include pictures and so on attached to MMS, mostly it’s SMS but some are MMS.

I’d like a way to export this… to a PDF for example would be great… any idea of a tool for this?

By the way the OS of the phone is Symbian S60.

Thanks!