Colissimo and Chronopost shipping extension based on weight.

Simple!

Extensions > Extensions > Shipping > Colissimo Shipping

France
0.250:4.95,0.500:6.25,0.750:7.10,1:7.80,2:8.80,5:13.35,10:19.50,15:22.50,30:27.80

Europe
0.250:9.90,0.500:12.30,0.750:14.3,1:15.20,2:17.20,5:22.00,10:36.30,20:60.30,30:60.30

Monde
0.250:24.35,0.500:24.35,0.750:27.10,1:27.10,2:37.30,5:54.55,10:103.10,20:164.50

Extensions > Extensions > Shipping > Chronopost Shipping

France
2:35.00,5:40.00,10:49.00,15:58.00,20:67.00,25:76.00,30:85.00,