I've seen a number or websites that have (Or appear to have) 3 Frames. (Left and Right are approx the same in size... And Center)

would the code Look like this? :

<frameset cols=15%,70%,15%>
<frame src="left.html" name="leftside">
<frame src="center.html" name="Center">
<frame src="right.html" name="rightside">
</frameset>

Or...On these sites, is What LOOKS like the right frame..really One Big frame (in disguise) With what appears The Middle and Right Frame (To Make The Right Frame appear as two..)?

Yes, that is the correct code.

I am not sure what you are asking about in the second question, but maybe this site would help....
http://framecodes.tripod.com/

Aye. The 2nd question was a bit unclear...but ignore it:)

Thanks...