Instructions
Download the server files from the San Andreas Multiplayer website. To run a version 0.3 server, be sure to download the "SA-MP 0.3c R2 Windows Server" files.
Extract the downloaded file using WinZip or WinRAR. The location of the files do not matter.
Open the extracted folder and find the file "server.cfg." Right-click this file, select "Open With," and click on "Notepad."
Edit any settings you want by changing the words inside the quotation marks next to any of the options. The "hostname" option changes the name people will see when they connect to your server; the "maxplayers" option determines the maximum amount of players that can connect to your server at any one time; and the others are completely optional. If you're not sure what one does, just leave it as is.
Click "File" in the upper portion of the Notepad window and select "Save," then close the file.
Double click the " samp-server.exe" file to start your SA-MP 0.3 server.