They all should work without a problem. I checked with 1.40 and they don't get stripped out, make sure you add the following to disable code verification if you have problems:
Add this to your init header
verify_html : "false"
Use the documentation to find out how to exactly add that in.
I don't think so, because all what you can insert is predefined formats (h1,h2,h3,h4,h5,h6,paragraph,address,pre) ..
theme_advanced_blockformats : "h3,h4,code"
Problem is than this formats are predefined and if you insert any other elements, it is not working !
Next possibility is define own STYLE...
theme_advanced_styles : "Header 1=mystyleheader1;Header 2=myheader2;Acronym=myacronym",
This is nice, BUT ! it will insert this code..
<span class="myacronym">any acronym</span>
<span class="mystyleheader1">Any header</span>
BUT I need to insert this code..
<code>Any inline code</code>
<acronym title="Hypertext Preprocesor">PHP</acronym>
and this a don't know how to do it. In documentation is not found and in code I don't know where to change or insert code.
Can somebody help me please ? I mean concrete process..