I believe I heard that the main vita file (its lv0) has psp2 in the name. though, there could be multiple like that. I'm thinking it also had config in the name, but I could be wrong. I don't remember where I read that either. lol
You can fully safe change to health warning. + afaik the warning is called by shell.self (or maybe its even coded in it) , so with little effort you can make a plugin that skips it