Here's my code for global comments
CODE
<MTGlobalComments lastn="20" sort_order="descend">
<table border="5" bordercolor="#ffffcc" cellpadding="5" width="350">
<tr>
<td valign="top" width="70">
<b><$MTCommentAuthorLink show_email="0"$></b> <br />
<$MTCommentDate format="%b %e, %Y"$></a><br /><$MTCommentDate format=" %l:%M %p"$></td>
<td valign="top">
<MTFirstNWords n="20" append="..." keep_trailing="?!."><MTCommentBody convert_breaks="0" apply_macros="1"></MTFirstNWords>
<MTCommentEntry><br /><br />
[<a href="<MTEntryLink archive_type="Individual" >" target="blank">read: <$MTEntryTitle$></a>]</td>
</MTCommentEntry><br />
</MTGlobalComments>
My code for global entries is a bit more confusing, because each of my weblogs is displayed differently and I'm using MTCompare to do that, but it may help;
CODE
<MTGlobalEntries include_blogs="1,8,9" lastn="7">
<MTIfEqual a="[MTBlogID]" b="8" numeric="1">
<MTOtherBlog blog_id="1">
<$MTInclude module="Post Header"$>
</MTOtherBlog>
<img src="<MTBlogURL><MTEntryCategory dirify="1">/<$MTEntryBody$>.jpg" alt="<MTEntryMore encode_html="1">" />
<br /><br />
<div class="tinytext"> <$MTEntryMore$> </div>
<br />
<MTOtherBlog blog_id="1">
<$MTInclude module="Post Footer"$>
</MTOtherBlog> <MTEntryCategories>
| <a href="<$MTCategoryArchiveLink$>"><$MTCategoryLabel$></a>
</MTEntryCategories>
</div>
</MTIfEqual>
<MTIfEqual a="[MTBlogID]" b="1" numeric="1">
<MTOtherBlog blog_id="1">
<$MTInclude module="Post Header"$>
<$MTInclude module="Post Body"$>
<$MTInclude module="Post Footer"$>
</MTOtherBlog>
<MTEntryCategories>
| <a href="<$MTCategoryArchiveLink$>"><$MTCategoryLabel$></a>
</MTEntryCategories>
</div>
</MTIfEqual>
<MTIfEqual a="[MTBlogID]" b="9" numeric="1">
<MTOtherBlog blog_id="1">
<$MTInclude module="Post Header"$>
<$MTInclude module="Post Body"$>
<$MTInclude module="Post Footer"$>
</MTOtherBlog>
<MTEntryCategories>
| <$MTCategoryLabel$>
</MTEntryCategories>
</div>
</MTIfEqual>
</MTGlobalEntries>
basically, for globalentries, just replace MTEntries with MTGlobalEntries and add the blog_id's you want included (as per above). Make sure you change the closing MTEntries tags too. =)
and check out
this thread for info on modifying the global index template. Make sure you backup first =)