I also have the left trigger set to use F1 (for speed boost) You may wish to change that to l (lowercase L) instead. (a makes the rest of the line in a script not act as code, making it a comment) I have the buttons assigned to keys with letters that resemble the 360 controller button letters with the exception of LB and RB on the controller being mapped to 1 & 2 respectively and the back/select button being mapped to k.
I have put comments in the script to help find and configure the parts of the controller easier. Take a look at the button assignments, trigger assignments and maybe the Dpad & Thumbsticks. Unless you trust my controller mappings are all well and good, right click on the newly created file and select edit script. Now open notepad and copy and paste the text from -(right thumbstick as arrow keys and configurable) or -(this one has right thumbstick as mouse and right thumbstick button press as mouse click) into notepad and save it as a.ahk file.