Ow boy.. everything is on the site !
OK.. maybe quick :\
1. Make your script using Notepad. Ones done, 'File » Save As..'
Chose 'All files' as the save type and save like something as 'yourscript.rbc'
(You can use an other editor as well, just make sure you can save as a .rbc file)
2. Ones it's saved, go to your script and 'hit' it with your right mouse-button.
3. A Quickmenu will pop up with an option 'compile' (Added to the registery by PokéScript) Chose compile..
4. PokéScript will pop up and compile your script, now you get a .buf file in the same folder as your script..
5. DoubleClick the .buf file and BufRite will open..
6. Goto 'File » Destination' and chose your destination file = your ROM
7. Push on an org (I hope you made your orgs like this: #org $Test or #org $Done) and then put the Assign button (It's next to the 'adress-bar')
8. In the Assign window select an offset where to start to look for free space.. then hit the flashlight(?)
9. Just select the first offset and hit 'Reserve'
10. You can do this with all your orgs, but I don't think you must.. (to be sure, just do it :P)
11. Goto 'File » Burn' to write to ROM
12. Well, I hope you remember the offset where your script starts ? Well.. goto AM and edit a people script-offset by this one.
ALL DONE.. Did it help ?