Image Size for slide show - menu?

[mustang581]

I'm under the assumption that for creating VCD still menus or slide shows I should use an image size of 704x480. so what I normally do is to resize my pictures to that specific size but, what I'm noticing is that when I play the vcd on the tv it will only show about the equivalent of a 640x620 (roughly), basically I'm loosing the some of the edges.
is this normal?
I use Winoncd to create my vcd's
thank you for any replies.
Al

[mustang581]

correction: image size looks like 640 x 420