You just input the code as is in order, and make sure any master codes it needs to work are enabled and bam.
There's not much to be confused about. If I understand the broken english you're worried that your code has seven rows? Some AR codes are ridiculously long. Like I said just in put it in order starting with the top row then moving on. If that doesn't work then try going down the list vertically. The only time you actually have a problem is if it doesn't fit, which IIRC can't even happen.
Last time I used an AR was GenIV and it was hooked up to my pc and I could literally copy and paste the codes into it. IDK if they still work that way but damn it made it so easy.
http://www.youtube.com/watch?v=GtxCr5ju2EE&feature=related - If you played Mystical Ninja 64, you need to click this.