[CommanderDEATH]

I am new to PAWNO and I have a finished script here that I downloaded, but when I try to compile 5 errors come up:

C:\Documents and Settings\SERVERS\Desktop\My SA-MP Server\gamemodes\elr.pwn(25) : error 010: invalid function or declaration
C:\Documents and Settings\SERVERS\Desktop\My SA-MP Server\gamemodes\elr.pwn(752) : error 017: undefined symbol "vehhasminigun"
C:\Documents and Settings\SERVERS\Desktop\My SA-MP Server\gamemodes\elr.pwn(752) : warning 215: expression has no effect
C:\Documents and Settings\SERVERS\Desktop\My SA-MP Server\gamemodes\elr.pwn(752) : error 001: expected token: ";", but found "]"
C:\Documents and Settings\SERVERS\Desktop\My SA-MP Server\gamemodes\elr.pwn(752) : error 029: invalid expression, assumed zero
C:\Documents and Settings\SERVERS\Desktop\My SA-MP Server\gamemodes\elr.pwn(752) : fatal error 107: too many error messages on one line

Please can you help me in anyway, I really want to finish this! Tell me what each error means (or just the ones you can) and how to fix them, but anyway you can help is fine. I did not write this game mode so I don't really know what the code in the 2nd image means, enlighten me please. Thank you !!

There are images for you.