Hee hee... I’ve cracked it!

- so far...
What I did was kept my main content div like this:
<div id="Body">
<div id="DetailTextCol">
[*content*]
</div>
... and then I deleted [*content*] as a TV and it worked - I am now able to add content from the Document Content manager.
Unfortunately, (deep sigh) the rich text editor now has the Styles and Paragraph formatting drop-downs greyed out, so I can’t apply H1, P etc... obviously negating my css settings. Would you know the reason for this please? and how I can re-activate these drop-downs?
I have to sign out now but I’ll definitely be back either tonight or tommorow - your advice is very much appreciated.
Thanks