Don't know if this will help or not, but here is the HTML for my coutner:
<!--webbot bot="HitCounter" u-custom="57chevy.gif" i-digits="7" i-image="5"<br /> PREVIEW="<strong>[Hit Counter]</strong>" i-resetvalue="972300" startspan<br /> --><img src="_vti_bin/fpcount.exe/C:/My%20Documents/My%20Webs/Supercar%20Registry/?Page=index.htm|Custom=57chevy.gif|Digits=7" alt="Hit Counter"><!--webbot bot="HitCounter" endspan<br /> --><br />
I still haven't thought of a way to do it...popups are no good, but maybe a redirect or load a completely different page when the counter rolls over?