the nsp folder inside this .zip contains the correct paths for
everything to work OK by just draging it to your half-life folder.

Detail texture "lists" are included for all ns_ prefixed maps.

Detail textures are enabled in the console by the command r_detailtextures 1.

This feature will only work with geforce 3 ti and higher or radeon 7000(?) or higher
at this point in time.

This feature has not been officially announced by VALVe,
all information about detail textures has been derived from trial and error(AFAIK)
by various community members.

If you don't like bumps(in particular the texture used on the wall_lab set),
drag and drop the contents of less_bumps to your maps folder.