Tooltips on links (almost done)

I wrote a modification to FCKeditor 2.3.2, that can show tooltips on links (using overlib), and can make a link empty so just the tooltip is shown.
You can take a look into the sources, I commented them as best as I could. My modifications to original files are starting with '// AICI START' and they are ending with '// AICI STOP'.
To install this, just overwrite the original files (version 2.3.2)
Download from here : http://216.75.41.174/fck_link.zip

There are 2 issues:

1. If I write a message with 2 lines or more then < and > are inserted (this is normal). The problem is that after I view the source, there are some ' inserted and the HTML grows up, as you switch back to WYSIWYG mode and source again. If you don't view source, then all is ok.
2. The focus is lost when I press the LINK button to edit a link with tooltips.

I hope that someone can fix this, because it can be pretty useful...

Sorry for the bad english and maybe even the explanations are not so obvious