I made the header and sidebar using slices with photoshop but I want to continue the wood border into the right and bottom of the main content. What is the best way to do this?
Are they small images stretched or one large image. If they're one image I suggest selecting the horizontal selection tool in a certain area and stretching the image.
For the bottom border just use one of the images from the header and use it for the footer.
Use Photoshop or Coreldraw they are best in graphics line, or you can use html as well, i don't know what are you perfect in but this are the ways you can choose from.