USBloader GX beta rev 1137 can dump your nand to your HDD or sd, for it's savegames emulation. you can also use a copy of that same dump to install content to with showmiiwads. You can load the content with usb loader gx .
Compatibilty is'nt 100% yet, because of cIOS limitations right now ( being worked on ) but the loader supports what is possible right now.
You'll need d2x v 7 final installed to slot 249 to use the nand save emu or/and the channel emu .
Other option would be to set up a sneek/ uneek nand and use Neek2o to load your games. But this will be slower as the complete nand will be used in an emulated way.
The nand has to actually boot just like a normal Wii.
Compatibilty in Neek2o is 100% last time I checked. You can load all your games right from the Emulated system menu's disc channel.
Postloader is also able to do all the above.
It's an ideal solution in combination with Priiloader.
Look at the topics for more info.