Waninkoko has released apps for extracting and installing Wii savegames.
Savegame-Extractor_v1
+--------------+
| DESCRIPTION: |
+--------------+
This application allows you to copy a savegame from
your Wii to a SD card (even those savegames that
you can not copy through the system menu).
+-------------+
| HOW TO USE: |
+-------------+
1. Execute this application.
2. Insert the game DVD and press RESET or A button
(Wiimote not supported).
Savegame-Installer_v1
+--------------+
| DESCRIPTION: |
+--------------+
This application allows you to install a savegame dumped
by the "Savegame Extractor" in your Wii.
(data.bin files not supported).
+-------------+
| HOW TO USE: |
+-------------+
1. Copy the savegame you want to install to the SD card
(directory "wiisaves/", just keep the directory
structure created by the "Savegame Extractor").
2. Execute this application.
3. Insert the game DVD and press RESET or A button
(Wiimote not supported)
source: wiiNewz.com
Savegame-Extractor_v1
+--------------+
| DESCRIPTION: |
+--------------+
This application allows you to copy a savegame from
your Wii to a SD card (even those savegames that
you can not copy through the system menu).
+-------------+
| HOW TO USE: |
+-------------+
1. Execute this application.
2. Insert the game DVD and press RESET or A button
(Wiimote not supported).
Savegame-Installer_v1
+--------------+
| DESCRIPTION: |
+--------------+
This application allows you to install a savegame dumped
by the "Savegame Extractor" in your Wii.
(data.bin files not supported).
+-------------+
| HOW TO USE: |
+-------------+
1. Copy the savegame you want to install to the SD card
(directory "wiisaves/", just keep the directory
structure created by the "Savegame Extractor").
2. Execute this application.
3. Insert the game DVD and press RESET or A button
(Wiimote not supported)
source: wiiNewz.com