Hi Paul,

if double of desktop size is sufficient,
you can put a "Image Class" on the form and:

* set
form.Scrollbars=3
Image.Stretch = 1 && or 0 if you not want zoom rescaling
* and use this code on one form.loadimageMethod procedure
 this.Image.Move(0,0,ImageWidthReScale,ImageHeightReScale)
 this.Image.Picture="myImagePathFile"

You can put Labels over the image with ZOrder method,
and with Form.ViewPortxxxx properties you can control the position.

Fabio