300 x 250 unit:
general code:
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="300" height="250" id="civil_war" align="middle">
<param name="allowScriptAccess" value="sameDomain" />
<param name="movie" value="http://marvel.com/flashjunk/civil_war.swf" />
<param name="quality" value="high" />
<param name="bgcolor" value="#000000" />
<embed src="http://marvel.com/flashjunk/civil_war.swf" quality="high" bgcolor="#000000" width="300" height="250" name="civil_war" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
</object>

myspace.com-safe code:
<embed src="http://marvel.com/flashjunk/civil_war.swf" quality="high" bgcolor="#000000" width="300" height="250" name="civil_war" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />

425x125 unit:
general code:
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="425" height="125" id="civil_war_400" align="middle">
<param name="allowScriptAccess" value="sameDomain" />
<param name="movie" value="http://marvel.com/flashjunk/civil_war_400.swf" />
<param name="quality" value="high" />
<param name="scale" value="noscale" />
<param name="bgcolor" value="#000000" />
<embed src="http://marvel.com/flashjunk/civil_war_400.swf" quality="high" scale="noscale" bgcolor="#000000" width="425" height="125" name="civil_war_400" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
</object>

myspace.com-safe code:
<embed src="http://marvel.com/flashjunk/civil_war_400.swf" quality="high" scale="noscale" bgcolor="#000000" width="425" height="125" name="civil_war_400" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />

jpeg signatures:
I'm with Cap:
<a href="http://marvel.com/comics/22?tid=2099" target="_blank"><img src="http://marvel.com/flashjunk/CaptAmer_425x100.jpg" width="425" height="100"></a>

I'm with Iron Man:
<a href="http://marvel.com/comics/22?tid=2011" target="_blank"><img src="http://marvel.com/flashjunk/IronMan_425x100.jpg" width="425" height="100"></a>