The "my book" have a powersupply, the "my passport" are 2.5" drives and no power supply, they are comepletely different. They do NOT ALL WORK, as the new drives can have problems since people have stated they are having problems with them working.
Personally I find Loadstructor and cloader to work really well. You can very easily create wii channels with Loadstructor and cloader had worked with everygame I've thrown at it.
edit: I just reread you need a discloader. Scrap what I wrote and get yourself NeoGamma.
I use Loadstructor to make a wii channel and as a loader I use cloader. The settings I use are as follows, everything on default apart from the cIOS, I use cIOS 222. I have updated/patched cIOS 222 and 223 with hermes waninkoko thingo. here...
Are you using IOS 249 to run HBC?
Sorry to hijack but this could be related. My wii is the opposite. GH5 won't see the SDHC card, but HBC and the SM and everything else will see it fine. Is this because I haven't updated/patched IOS 56 and instead am using IOS 222 instead of ISO 249 to run GH5...
Dude everything you need is right here stickied up the top.
I used this giude... http://gbatemp.net/index.php?showtopic=171901 and updated my 3.3 to 4.1e and softmodded it all using that guide. Can't go wrong.
Also got my 3in1+ from DX and it doesn't work with my AK2 or Cyclo. I'd say it's just a matter of time before TC and Rudolph update their software to be compatible with the new 3in1+ because it seems like lots of people are getting these and these will be the only ones available from now on out.