Hello
there are few mods for this in ressource center (yurik, priority logo...)
or U can just add fields in links.def (don't forget to use upgrade.pl script if U got some links in links.db).
There is a FAQ about this in ressource center too.
And use this following code in links.html if U used templates (eg with added field calls image)
<%if image%>
<img src="/images/<%image%>.gif">
<%endif%>
Don't forget to upload evry image in your images directory.
And now in from your administration board,
in field "image" : put for example : "dog",
upload dog.gif in images directory, and it will be allright!
There are a lot of similar posts (i've posted the same question, U can try to search with my username, Eliot has given me good advice
ciao