depending on exactly what you're looking for...
<table width="100%">
<tr>
<td align="right"><img src="image"></td>
</tr>
</table>
OR, could use CSS:
BODY { background: url(testImage.jpg) fixed no-repeat right top; }
CSS sets the image to the bottom, top, middle of the screen on either the left or right side, depeding on what is specified.
Works with: IE6, NS6/7, Opera 6.04, AOL 7
Does not work with NS 4.x