.swf popup on pageload?

We have a client interested in having a shockwave popup window load when his site is pulled up that has a form on it, I think that we are okay on creating the form in swish, I have done that before although it's been a while but where I am needing some help is how is the best way to popup a flash or shockwave popup window on pageload? I have seen this done w/out getting nailed by popup blockers, etc.

Any help or suggestions you can provide are appreciated, I found this post but it was from last year and I don't think that anyone really answered this guys questions: http://board.flashkit.com/board/showthread.php?t=679590&highlight=flash+popups

Standard pop scripts will work body onload in html or
if you want to you can use a frame action.

Usually the first thing I do when I see an automatic pop up is close it.
I get pissed fast. Most folks have pop up blockers these days they do for a reason.
Having a popup is a good way of making sure the visitor does not see the form.

Thanks Frets -

I appreciate your response, I agree totally on the pop-ups thing, this is just something that our client has requested and we are trying to comply. What they are wanting is something like this

Iframe in an ilayer.

http://dynamicdrive.com/dynamicindex11/dhtmlad.htm

Thanks, that's exactly what our client is looking for. Thanks a lot!