what it will do is the mods that aren't supported by the texture pack in question will just use the default skin. It looks kinda weird when running a 128x pack and coming across a 16x ore or something, but there will be no glaring bugs.
I think that the thing you are worried about is the MCpatcher not working with yogbox. Which is true. It won't. You have to use Optifine (formally Optimine/Optifog)
Rollback Post to RevisionRollBack
"Look, I don't care if your 8 or 20. If you can't take criticism or opinions, then get off the internet." -Stronghold257