> How to download the rest of the jpg in the website server?
I'm afraid you can't, due to the ShowLarge() javascript 
function which builds URLs with the parameter given:

	function ShowLarge(sUrl)
	{
		large_image_win = window.open
('/girls_of_maxim/pop_up.asp?image_url_value=' + 
sUrl, 'large_image_win', 'width=400,height=580,scrollbars=no
,resizable=no,status=no,location=no,menubar=no');

Such code can not be scanned by httrack, as it is too 
complex for the (rather basic) javascript parser ; I 
suspect that httrack will try to fetch the url given in 
parameter (which will cause a 404 error)