Nothing really special, but pretty much has a 98% chance of Hello World working properly
First, put the tiff exploit picture inside a Photo subfolder, and place a .JPG with a name AAA along with it.
When you boot up your psp go into the Photo folder, and make sure the thumbnail of the AAA.jpg loads, also make sure the nearby pictures on screen load as well
After that, press the triangle button and click Slideshow over the 'Helloworld' subfolder, it should load up the Hello World program instantly without crashing.
idk if anyone else already knew this, but just throwing it out there.
P.S. I've tried this about 20 times and only screwed up twice.