HTC Hero

I am trying to get my sms messages to be saved to my SIM card. Do you know how to do this on an HTC Hero. Also, I have downloaded a back up application from the market place which seems to have saved only some of my text messages. For example from one particular person i have over 200 sms yet only 50 are in google. Do you know why? or more importantly how i can get all 200 over to Gmail
Hoping you have an answer...for a lady that is not too good with technology.
thank you