You want to event copy function? It can easy to modify template, little bit. (using template manager)

--- eguide_admin.html.~1.13.~	2009-11-15 17:53:41.000000000 +0900
+++ eguide_admin.html	2009-12-23 12:39:55.270951550 +0900
@@ -200,6 +200,9 @@
 <p><{$input_status}></p>
 <{/if}>
 <p>
+<{if $eid}>
+   <div><input type="checkbox" name="eid" value="0"><{$smarty.const._MD_NEWTITLE}></div>
+<{/if}>
 <input type="submit" name="preview" value="<{$smarty.const._MD_PREVIEW}>" />
 <input type="submit" name="save" value="<{$smarty.const._MD_SAVE}>" />
 </p>

It is not yet decide to default function in eguide. Because many the function will be confused operation (edit or create new?) article. So consider it.