"how can i use homebrew apps without having custom firmware on my psp?"?

"how can i use homebrew apps without having custom firmware on my psp?" i have this ad-hoc app were u can talk to each other from 2 psp's but i need custom firmware to start it cuz it just says cannot start when i try starting it.and i dont want cuzstom firmware cuz iv herd alot of bad stuff about it.