Go on e-bay and buy a memory card reader for a few £. This plugs in to a spare USB on your PC and you can then slot the card in the reader. Then you can just click and drag the pic's from your hard drive "c" to the memory card.
Just make sure you buy the correct reader for the card type.
May even be worth while buying a small capacity card to leave in the picture frame so that you can still have the other one in the camera.
http://cgi.ebay.co.uk/23in1-USB2-0-C...cmdZ ViewItem Watch the postage on cheap readers .... bumps the price up.