first, codes:

add these to your Custom BB Codes list

{flash} is replaced by (embed src=
{/flash} is replaced by (/embed)

then use {flash}http://www.site.com/yourflash.swf HIGHT=x WIDTH=x BGCOLOR=x {/flash}

note: ( and ) = < and >, while { and } = [ and ]

you can also use the other flash params but im not going to go into that.

as for the buttons, it'd be easier for you (and your server admin, since he'd have to install extensions last i checked) to export your flash animations to seperate animated gif files, and then use a simple RollOver javascript to do your buttons. it would end up looking basically the same, and you'd save yourself a huge headache playing with generator. still, though im pretty sure there are tutorials that come with it you could read if you were bent on using flash buttons.