This  external is  FreeWare, allowing unlimited use in any non-commercial stack. You just need in this case to mention the author's name and copyright in your stack. Any commercial use must be licensed and acknowledged by the author.

AboutBoxScroll is an XCMD which displays an "About Box" with a scrolling field.

Calling syntax: AboutBoxScroll

AboutBoxScroll loads text from a "TEXT" resource and will load a corresponding "styl" resource if one is present.

This XCMD uses the following resources:

DLOG 298
DITL 298
TEXT 298
styl 298

You must copy these resources along with the XCMD to your stack.

You can put additional icons, or picts, or static text into the DITL and resize it as long as you don't renumber items 1, 2 and 3.