CFGRID (mx7) - href for each column?

Can u help. I'm having fun creating cfgrid flash forms using CFmx7 and i need to modify my form below ...

<cfquery name="dispSearch" datasource="fred">
select * from opinions op join users u on u.userid = op.userid join opinion_categories oc on oc.opinion_category_id = op.opinion_category_id where opinion_title like '%bush%'
</cfquery>

<table width="605" align="left" border="0">
<tr>
<td width="605" align="left">
<cfform name="OpGrid">
<cfgrid name="grid" format="flash" width="605" height="400" query="dispSearch" selectmode="single" font="Verdana, Arial, Helvetica, sans-serif" fontsize="9"  rowheight="15" colheaderbold="yes">
<cfgridcolumn name="opinion_title" header="opinion topic" width="305">
<cfgridcolumn name="username" header="member" width="120">
<cfgridcolumn name="opinion_category_label" header="category" width="120">
</cfgrid>
</cfform>
</td>
</tr>
</table>


i need to allow the user to click the three columns to be taken to specific pages - based upon the record specific content of that record.

i.e. IF you click the cfgridcolumn name="opinion_title". ... i need to href the user to '/page_viewopinion.cfm?op=#dispSearch.opinion_id#'

i.e. IF you click  the cfgridcolumn name="username". ... i need to href the user to '/page_viewprofile.cfm?u=#dispSearch.userid#'

etc!

I can see the cfgridcolumn tag allows for href="URL" but it does not seem to want to work!

any ideas?
Richard