noob question

hey....i have a question noob...
first i need to instale the HALF LIFE 1, after the steam and download form steam the half life files to play ESF?
because in the topic "how to instal ESF" it seens that i DONT instal half life, i DOWNLOAD IT from steam!!
can someone help me?

Downloading it from Steam = installing it.

i relly dont understand
in order is:

1- instal half life 1
2- download steam and follow the steps of "how instal ESF"

is that right?

Follow the steps in this thread in order.

so i dont use the half life 1 CD to instal...i need to download it from steam...its free if i have the original cd key?

That's right.

very thanks...sorry for the noob question ^^