1) I added a lot of Wiiware to the NAND (about 200 titles) using showmiiwads, but then NEEK2O/UNEEK stops with a black screen at loading time. If I add only a few Wiiware, then it loads. What can it be ? If it could be a single WAD causing the hang, is there a program to check WADs validity ?
Nope, to make sure its valid, install them in your NEEK2O nand with MMM or another WAD installer.
2) To load Wiiware I would like to use something like Triiforce, Mighty Channels or the recently released postLoader to have access to all of my wiiware on USB, from inside NEEK2O. Is this possible ? I tried with Triiforce and Mighty Channels but they hang my Wii with a black screen and I have to do a turn off/turn on.
postloader loads but it doesn't "see" my USB drive, nor my emu nands, because my nands are on USB and it looks only on my SD.
That is up to the devs of those programs, unless the devs from NEEK2O take it up..btw, i do know it is on the todo list of Postloaders dev to have USB access.