if you have photoshop or photoshop elements then load in the photo and use image - size and increase the number of pixels width - photoshop will do the rest then save as
Ok im on photoshop now and have my photo but i cant see where it says how to increase the size Rubbish at these things
Click on 'image' (at the top of the screen) then pick 'image size' from the drop down menu
A image size popup will appear and the first entry box will be 'width', just increase the number in this box then press 'ok' doubling the number in the box will double the width of the image photoshop will automatically adjust the height for you