The only difference between scripting for RS3 or OSRS and scripting for RSPS is that you can't use SMART, which is a client that runs Runescape for you and has its own internal functions, including mouse functions that won't interfer with your mouse, allowing you to use your computer while botting.
Therefore, you'd have to script like I do: using a target client. In this way, mouse functions will all use your own mouse to do things, so the targeted client will have to be the main screen at the whole time you are botting; even if you try to do other things, the running script will move your mouse everytime, making it impossible to do anything else but botting. To script like this, all you have to do is click this buttonon SIMBA:
http://gyazo.com/cc6dccd447cc1f6aa31d7407fd8fb9ae and, while keeping the left mouse button pressed, drag the icon to the client you want, the RSPS screen, in your case. The rest is just the same as you'd do in SMART, programming as usual. A tutorial to learn programming (it seems updated with SRL6, but I haven't checked) is:
http://villavu.com/forum/showthread.php?t=58935, the one I learned with.