the contacts in your phone are in .vcf format. you can move these contacts to your PC by doing the following. First of all mark all the contacts then move them to your memory card this can be done by using the copy business card option.
After copying the contacts to your memory card, connect your phone to PC and select mass storage.
Then go to my computer and open your memory card and in that open others folder, there you will find another folder named contacts.
Open the contacts folder there you will find the contacts. You may copy those to your PC and to restore them from your memory card you may use the restore option present in your phone. hope this helps.