Will wiiflow loader work on newly updated 4.3u ?
Yeah, just follow the wiiflow guide. It will work on any version Wii as long as you have properly softmodded it.
[spoiler=Click here for useful links]Softmod any Wii guide Yes ANY Wii!!!
FAT32 Hard Drives - Formatting, Loading, Ripping, Playing (recommended USB setup)
Ultimate List of Troublesome Games & Solutions
The Noob's Guide To Getting Help
How to Run & Post a System Check
Blackscreens & Freezes - Causes & Solutions[/spoiler]