[rootnik]

I know this is a long time ago, but here is the answer (I was searching for it)

open your advanced search page and search for the HTML that has the option you are looking for. My example is from a drop down box"

<div class="fieldset">
	Color:<br />
	<select name="field10" id="csel_field10">
		<option value="0" selected="selected"></option>
                <option value="1" >White</option>
                <option value="2" >Black</option>
	</select>
		
</div>

Notice the vaules...

White is 1
Black is 2

so to link to the search results for white...

memberlist.php?do=getall&field10=1

I could use some help finding a way to only show a list of members who have a custom text field filled out, no matter what the value is.