[jQuery] How to speed up IE6/IE7 $get();

[Up-Works]

I am loading a PHP script upon a select element changing, the PHP
calls to db and then loads an avg of 100 PNG files that are between
5-10k.

In both safari and FF there is no lag at all but in IE7 it is 15
seconds of waiting and in IE^6 it is up to 45 seconds.

It almost seems that in both IE's it hangs and isn't doing anything
then it resumes and you can see the images loading in the status bar
at bottom of browser.

Is there a way to optimize this code below for IE?

Here is my code:

{{{{{}//.change function clipped below is what is in side
the .change() function:
$.get('newbackground.php',{'type' : 0, 'sport' : $(this).val(),
'prod' : 462},
        function(data){
        $(data).insertBefore($
('fieldset#selBG').children('div.buttonWrapper'));
        });