Bino's, although I cannot verify it I think that what you want to do is not possible in Excel. One small document will always at least contain one sheet with the maximum number of cells.
To make sure that it will always print right I would suggest selecting the cells that you want and selecting 'File'-'Print area...'-'Set printing area'. Now go to the 'File' menu again and in 'Page setup' select 'Fit to 1 page wide by 1 tall' and choose portrait or landscape as needed.
These settings will not go away so you should not have to select any cells whenever you want to print this sheet again. (As long as you don't expand the area of the sheet you're using beyond the printing area of course.)