Hi, gorilla,
first; don't use the colspan attribute if there's no other row with those cells in it. It makes most browsers render your table wrong.
If you leave that out, give the second cell from the right a width="1" and the right cell a width of 100%.. well, that'll work most of the time. Building flexible tables can be tricky.
Code:
<TABLE border=1 cellpadding=0 cellspacing=0 width="100%" bgcolor=ffffff>
<TR bgcolor=ffffff height=75>
<TD border=0 height=75 width=62><IMG src="topl009.jpg" width=62 height=75 border=0></TD>
<TD border=0 width=214><IMG src="walshlog6_01.gif" width=214 height=75 border=0></TD>
<TD height=75 width=128 align=left bgcolor=005e00><IMG src="ltop14.jpg" width=121 height=75 border=0></TD>
<TD bgcolor=005e00 width="1"><IMG src="1pix.gif" border=0></TD>
<TD align=right bgcolor=005e00 width="100%"><A href="direct.html"><IMG src="ltop6.jpg" width=214 height=75 border=0 ></A><IMG src="1pix.gif" height="1" width="5"></TD></TR> </TABLE>