You could do it with javascript/jQuery and hide your flash elements in divs and show them when you want, or if you just want to load one after each other after X seconds, you could just use jQuery Timers (http://plugins.jquery.com/project/timers).
A quick example:
<div id="asset1" style="display: none;">
...
insert flash here
...
</div>
<div id="asset2" style="display: none;">
...
insert flash here
...
</div>
<div id="asset3" style="display: none;">
...
insert flash here
...
</div>
...then you can use jQuery timers to load one after each other, by fading it in or sliding it in - or any other effect you may want to use.