Object conversion help

Hello, I need someone to help me and convert some .hvk files to .dae or any other format that C4D can open for me because they are needed for https://youtu.be/RRBvIW6B_rY?t=1m24s
Thanks in advance and have a nice day

Download for Models: http://www.mediafire.com/download/yzhccs...bjects.rar

The file contains models for:
Billboard
Broken Billboard
Debris
Broken Debris
Shipping container
Broken Shipping container
Semi truck
Broken semi truck
HUGE ball of junk
Broken HUGE ball of junk
Pickup truck
Broken pickup truck
Car ram (Literally!)
Steam roller
Broken steam roller
Sports car
Broken sports car
Water tank
Broken water tank
Taxi
Broken taxi
bsl_obj_tornado_ballA ?
bsl_obj_tornado_ballA_brk ?
Metal barricade 1
Broken metal barricade 1
Metal barricade 2
Broken metal barricade 2
Collapsing/Collapsed road 1
Broken cement pillar 1
Slanted Collapsing/Collapsed road 1
Collapsing/Collapsed road 2
Broken cement pillar 2
Slanted Collapsing/Collapsed road 2
Floating floor 1 (Small piece of debris)
Floating floor 2 (Billboard 1)
Floating floor 3 (Billboard 2)
Floating floor 4 (Pickup truck)
Floating floor 5 (Chunk of grey building)
Floating floor 6 (Road)
Floating floor 7 (Chunk of brick building)
Floating floor 8 (Chunk of withe building)
csc_obj_floor_4bxh8_R ?
Glass frame
Lava platform 1
Lava platform 2
Cone 1
Cone 2
Cone 3
Cone 4
Water tank (thrown)
Broken water tank (thrown)
Sports car (thrown)
Broken sports car (thrown)
Taxi (thrown)
Broken taxi (thrown)