From left to right: Cannibal, Ken, Skeleton, TMCM Models previews included with Further Data, not presently in Half-Life base. If you would like to weed these out before moving, see below.
If you follow these instructions, it will work, but there will be some duplicate models and maps in the multiplayer UI, as there are some models and maps that are already currently included with base Half-Life.
Move the contents of valve into Steam\SteamApps\ steamusername\half-life\valve.Move the contents of Logos into Steam\SteamApps\ steamusername\half-life\valve\logos.It contains an installer, but that installer expects the original Half-Life installation, and will not work with Half-Life for Steam. It does not contain Uplink or the 1.0.0.8 updater, which were included in other directories on the CD. This is a Zip archive of the entire "FurtherData" directory on the V.1 CD. Overall, the CD was 59.87 MiB of data and 38 MiB of audio. The CD was a pressed CD, with a halftoned black on silver face printing. The first was "Adrenaline Horror" and the second was "Space Ocean". The CD was a hybrid data/audio CD, and contained two audio tracks, both soundtrack tracks.The "Half-Life Web Site" took you to (currently dead), while the "Game of the year" button took you to (also currently dead). An autorun installer menu, that allowed you to choose between the above three options.Half-Life: Uplink, the standalone Half-Life demo with a storyline not in main Half-Life.Half-Life: Further Data, available and explained below.The two known CDs are currently Half-Life: Further Data V.1 and Half-Life: Further Data V.2 They were released in 1999 for free through retail outlets, and were never officially released by Valve online. Half-Life: Further Data is a series of companion CDs, containing a collection of additional multiplayer models, maps and logos/sprays for Half-Life. Half-Life: Further Data V.1 main installer menu Half-Life: Further Data V.1 back cover scan