[CS3] best practice of loading flv's

Hi all,
Ok well im looking for some advice really, as ive approached a curious obstacle in the site im currently making.

im trying to build a site in (i was told) the 'correct' way...

everything so far is on one frame and elements are called and removed thru actionscript...

So far ive been calling information up through movieclips etc, now i need to bring in flv's and a image gallery.

I tried bringing in an flv and calling it on a buttonpress but it is slowing down the whole site, even before the flv is called. Is this because a lot is going on in one frame?

Whats the best course of action? Adding a couple more frames to hold the flvs, thereby speeding up the site on all other frames?
Ive heard 'attachMovie' might be another option too, would that be a good way to do it? Im no expert with actionscripting at the mo so im hoping theres a pretty painless way to do it.

Thanks in advance for any help and suggestions...

*the site so far is at www.tenyearfilms.com
*the flv would be at... > baranguy boy > play film