Hi John, this is probably the best site to view for the basic how to info
Espaliers very sound general advice, but also look here for great pics to give you insperation for the patterns and final effect you might desire...
Trees Sundry
Espalier is a much neglected technique for growing trees in very small spaces but it does require a lot of dedication and patience. Good Luck
PS Guy is right put some pics up and we can give you much better advice as to what appears possible and what does not!