Half Life: Source modding?

[=[Ga]= AutoDMC]

I'm tempted to create a few maps, etc, for Half-Life: Source; I'd like to use the Half-Life Textures, Half-Life Weapons, etc, not the Half-Life 2 counterparts.

However, I can't seem to find any tutuorials on how to go about modding Half-Life: Source... any ideas?

I'd actually really like to tinker with Black Mesa: Source, but they're playing so close to the chest that except for a few random videos and screenshots, it's hands off!

Anyone ever tinkered with Half-Life: Source?

 

[KilledWithStyle]

Half-Life source is a technical demo of HL2. When Valve released HL2 they said that their engine could also handle HL1 materials with no to minimal code conversion. So create a HL1 map is my best guess.