additional information in the documentation

index.html

@@ -289,6 +289,13 @@ exit</pre>
     You'll always end up with a consistent cross compiling environment.
     </p>
 
+    <p>
+    If you have trouble here, you can try different versions from the 
+    <a href="#download">download section</a>. Also, please feel free to
+    contact the mxe team through the 
+    <a href="http://lists.nongnu.org/mailman/listinfo/mingw-cross-env-list">project mailing list</a>.
+    </p>
+
     <p>
     After you're done it just needs a little post-installation.
     </p>
@@ -2220,6 +2227,11 @@ USE_OSGPLUGIN(&lt;plugin2&gt;)
         fill in the <code>$(PKG)_*</code> fields.
         </p>
 
+		<p>
+        To fill the <code>$(PKG)_CHECKSUM</code> field, use a command such as (for file gettext.mk):
+        </p>
+        <pre>make update-checksum-gettext</pre>
+
         <p>
         Be especially careful with the <code>$(PKG)_DEPS</code> section.
         The easiest way to get the dependencies right