For skinning I was helped alot by JAPER From this tutorial 

http://www.l4dmods.com/index.php?option=com_content&view=article&id=42:japers-qskinning-for-dummiesq-tutorial&catid=8:skinning&Itemid=16

So if you yourself want to start I would recommend this tut.


Put the biker folder in Left4dead/materials/models folder 

make a backup of the pak01_.vpk  and the whitelist.cfg  then replace them with the ones from the rar.

enjoy

WARKRIME-SCW-

