Wisescript supports rich text format. Create an rtf document and format to your liking, but rename the .rtf extension to .txt. The dialog should be able to display it.

There's no need to use WiseScript for this.  You can just stick a vbs custom action into the MSI to dynamically read in a licence or readme rtf file.

I've attached a .txt file which contains vbscript that can be used as a custom action to read in a file named _License_Agreement.rtf (at install time) from the folder where the .msi file is running from.  The vbscript updates the row in the Control table which contains the License Agreement text.

I've also attached two .zip files, one for Wise Package Studio (or Installation Studio) 7 and another for Wise Package Studio 8 which demonstrates it by using the vbs custom action from a property (an example license agreement file is also included).

Thanks Evan for your samples!  Your solution is exactly what I need it for my previous problem reading text file dynamically. :-) 

The problem is this time I am creating the installer from WiseScript Package Editor and it doesn't seem to support rich text format.  I want to add the Read me at the compile time.  The Read Me dialog in wisescript editor asks for ASCII text file.  I don't know how to convert my rich text file to ASCII text file that still preserve the format setting as in rich text. 

Thanks JohanH for your reply!  I tried your steps but it didn't work.  Attached is my example.  Is there any other way to do it? 

Many thanks!