Hello good sir.
Well you must first install scar/srl like this:
http://www.villavu.com/forum/showthread.php?t=47714&highlight=setupThen you download a script, read instructions, fill in proper settings, and run it!
Note, many scripts are old and outdated right now due to many runescape updates, so youll need to check the first and last few posts of the thread to get an idea of if the script is up to date or not. If they arent, just try looking for more, or wait.
Also, we have a great tutorial section for everyone from Beginner to Advanced to learn how to script and make your very own script. Id suggest after some time learning to make your own scripts so you can make whatever you wish and help contribute back to the community! After you can script, and apple for SRL Member, you can access a whole new script section with many more/better scripts to choose from! So try to do that for a wider range of fun scripts to use!
Good Luck here at SRL!