not just any "YAWMM"
please, use THIS ONE :
https://github.com/FIX94/Some-YAWMM-Mod/releases
It's the most recent release, It has been updated by Fix94 to work on both Wii and vWii.
This version doesn't need cIOS anymore, no IOS236, no cIOS249 etc.
It just works with IOS58 and AHB access, no more negative error number users don't understand.
be sure you use the provided meta.xml too.
On the other hand, like said above, You could use emuNAND instead because your NAND is space limited.
EmuNAND will allow you to install more game at once, prevent banner brick your console, and you can have multiple region.
it's just a little harder to setup for few games which require Neek, but for these games you can use your real NAND if you don't want to bother with neek. it's just less safe.