yeah, I guess wiiflow lite is more up to date, but I forget to add "lite", I talk about that tool in general as I don't follow the development I don't know how many mods or branches there are. but I think the original wiiflow already had support to be launched directly from neek, so all child project should still have that option.
You can also try with CFG loader, maybe it's supported, but I know that loader even less than Wiiflow.
if the purpose is to launch a Wii disc based game (not a channel. Well, channels work too), I suggest you use the hidden game menu to mount the game into the neek's disc channel, and launch the game as if it was a real inserted disc launched from the system menu.
If you are using neek for games with AP (tintin, or We dare, for example), then it's the only way to make it work, using an usbloader inside neek will not help as usbloaders always reload to cIOS, which neek will use the original redirected IOS, not a custom one, and the game won't trigger the AntiPiracy at all.
You need "+di" when you setup neek, which will add a di.bin file into sneek folder.
when di.bin file is present, it redirects the disc interface (di) to current partition :
current_partition/wbfs/wbfs games here/or here (same path than usb loaders) <-- if you use neek2o
current_partition/games/TitleID/FS extracted game here/ <-- if you use neek. you can extract a game using Trucha signer or Wiiscrubber