To install VitaFTP using Gravity Crash exploit:
1. Download
VitaFTP
2. Inside the zip file, there should be a folder and a readme doc. Open up the folder and extract the contents of that folder to a safe location.
3. Go to where you extracted the contents and look for a file called INSTALL.ZIP. Open that and extract the EBOOT.PBP file to where you extracted everything else.
4. Now, you should have a folder with the following files:
DATA.BIN
EBOOT.PBP
ICON0.PNG
INSTALL.ZIP
PARAM.SFO
5. Take all those files and put them in the following directory (create it wherever you wish, I just use C:\ as an example):
C:\PSP\GAME\VITAFTP\ *MAKE SURE EVERYTHING IS IN CAPS*
6. Right click on the PSP folder and use whatever archiving software you have to make it a ZIP file and name it VITAFTP.ZIP. Make sure that the resultant file ends in .ZIP (All caps).
7. Place the zip file in the savedata folder that ends in 01, and copy over the save using CMA or openCMA
8. I think it should be pretty obvious what to do from there
Doing it any other way just made the exploit not work for me for some reason (I'd select load level, exploit, save level and then receive an error and be kicked out).