Halo CE Custom Maps - Truth Island

Jim heads a rescue mission to save the squad investigating the crashed ship, not all goes as intended.
Storyline -
Part 1:
A covenant drop ship was patrolling halo when they spotted an island, it went in closer to land when it was attacked by flood and crashed. After communications were lost the covenant got suspicious and sent in more dropships to find the crashed drop ship and set up base. After they got there they discovered the flood, so they ask for reinforcements, and thats where you come in.
Part 2:
After you found the crashed drop ship the flood was getting too strong and you get infected. The flood take over the island and all covenant forces are eliminated.