If you forget the actual list box, but use a table and anchors something like the following might be ok?
// in style section
#lstName { width: 300px; height: 200px; overflow: auto; }
#lstName * a { width: 100%; }
// in main html section
<table id='lstName' cellpadding=0 cellspacing=0>
<tr><td><a href='./summat.asp?0'>Option in list part one</a></td></tr>
<tr><td><a href='./summat.asp?1'>Option in list part one</a></td></tr>
<tr><td><a href='./summat.asp?2'>Option in list part one</a></td></tr>
<tr><td><a href='./summat.asp?3'>Option in list part one</a></td></tr>
</table>
Of course the actual ASP would be a loop to create the insides from a database.
Is that the type of thing you meant?
You may need an action.asp file to deal with it... but you can put all the arguements etc on the href bit.
If you are looking for a multicolumn actual list box, you might need flash or some other plugin, and I have no idea whether these get posted with the forms info.
Vince