All of the available downloadable maps on Transistor62 are zip except for the active server map archives. In order to open them you will need Winzip to open the zip files. An evaluation copy can be downloaded from: www.winzip.com.  Once downloaded and installed you can open zip files by clicking on them. It is recommend that when you download map zips files from my site that you save them to your Desktop, that way you can find them easily. To install a map from a zip file open the zip file by double clicking on it.

Winzip will start in Wizard mode, it is recommend that you use Classic.

You will now see the contains of the archive. Note the path is blank on this archive.

Using your pointer draw a box around the map.bsp and map.txt file to select them.

Now click the Extract button.

The following window will appear.

Next select C:

Select Sierra

Select Half-Life

Select tfc

Select maps

Now select Extract

The map is now installed. You can now play this map online on a server running this map.