Hi dboy1612,
Why are you trying to install the exploit-db inside of Metasploit? There is a copy of exploit-db already in Kali and the format of the exploits within range from php file to C code that needs complying. Most of which won't actually work directly within Metasploit as it's Ruby based and requires a certain folder/file structure.
If you run:
searchsploit [software]
It searches the local copy of exploit-db which I believe is updated as part of the normal update cycle.
OSCP, OSWP, Packet Monkey