actually just bothered to click thesaurus
Quote: "supplement
supplement, insert, pullout, insertion, inclusion, addition, enclosure
Microsoft® Encarta® 2007. © 1993-2006 Microsoft Corporation. All rights reserved.
"
I do want to add, I know the word inset very well, but just feel insert would be a more appropriate word to use...
Quote: "
insert
transitive verb [in súrt] (3rd person present singular inserts, present participle inserting, past and past participle inserted)
1. place something inside something: to put something inside or into something else
Insert the screws in the holes already drilled.
2. add something to something: to add new material to the body of something, especially a text
noun [Ãn surt] (plural inserts)
1. advertising supplement in magazine: a supplement in the form of a single sheet or booklet placed inside a magazine or newspaper, usually as advertising
2. added part: a piece of fabric, usually contrasting, that is sewn into a main piece
[15th century. < Latin insert-, past participle of inserere < serere 'join']
-insertable, adjective
-inserter, noun
Microsoft® Encarta® 2007. © 1993-2006 Microsoft Corporation. All rights reserved.
"
EDIT
Corrected wierdness in the post