How to save sms?

Just upgrading to 2.2 and I am wanting to keep a few folders of sms threads and am not sure how this works.  Through kies I can copy the messages to a floder on my computer and it saves it as a FILE_NAME.sme   

My question is can I view those messages and also can I install them back on the phone when i perform a factory reset. 

There are a couple of threads that I really need to keep and am worried about losing them. 

Any help with this would be greatly appreciated.

Thanks casz. I would love to try that but i think im getting one of thise errors that happens when you dont factory reset after upgrading to 2.2  I cant get onto the market as i get an error message.  I also can only get online using wifi. I cant use 3g or hspa. 

I had saved them to my pc using kies but dont think i will be able to put them back on after a factory reset. :-(

Well I got lucky last night and managed to get the market working and was able to try some of those sms backup tools.  I'm not exactly sure how the markey started to work again.  I was playing around with the running services and just thought, why not give it one more try.  Well it worked and I managed to back up my sms and it worked, even with the time stamps and everything.  I was pretty nervous and used two programs but with some luck the first one worked as it said it would.

So up and running with froyo 2.2 and trying to learn what is new and different.  There is a bit of a learning curve but with the help of knowledgeable people on this forum I might just get this phone figured out yet.