If you need to get stylized text into your Adobe Flash Catalyst project don’t use copy and paste. That will effectively remove all the bold, italics, underlined styles. Instead use the Place command found in Illustrator. I found that the Place command will even import Word docs with the styles intact.
To optimize workflow, place all your text in the Illustrator file before bringing it into Catalyst. To help with that, here’s an excellent tutorial on organizing and structuring your Illustrator files for Flash Catalyst development.