Having a full working offline mirror would be very difficult as
1. The search facilities cannot work
2. you would have to modify the form by adding a javascript
routine in all the pages of the mirror such as
<script type="text/javascript">
function goToPage(page) {parent.location=page;}
</script>

   <FORM action=http://www.vampiredust.net/wwhic/index.php
method=get>
   <input type="hidden" name="osCsid"
value="ea3f003325f360f5ce2cde7b298bec78" />
   <input type="hidden" name="osCsid"
value="ea3f003325f360f5ce2cde7b298bec78">

3. then replace
   <select name="cPath"
onchange="if(this.selectedIndex!='')this.form.submit();">
by
   <select name="cPath"
onChange="goToPage(this.options[selectedIndex].value);">

4. and you would have to set the real html option values

   <option value="">-- Jump to a category --</option>
   <option value="69" >Magnetic Catches & Strike Plates</option>
   <option value="26" >Table & Cabinet Legs</option>
   <option value="28" >Kitchen Accessories</option>
   <option value="77" >Sign Plates</option>
   </select>
   </form>

for example <option value="69" > should be replaced by
<option value="index49cb.html" >

These options can be accessed from the menu on the left,
thus the simplest is to enter
<http://www.vampiredust.net/wwhic/>
<http://www.vampiredust.net/wwhic/index.php?osCsid=ea3f003325f360f5ce2cde7b298bec78>
in the web addresses to mirror.
You will be able to browse the site without the the drop
down menu.