All right. Here's how you do it. Chances are, you were trying to take the fans off by way of unscrewing the part with the heat sink. Unfortunately, this is incorrect. The reason for this is you cannot get the fans out from the bottom. If you look to the big fan side of the RAM, you will note a few "pillars" that connect the bottom with the motherboard. You have to get past these. Scratch going in from the bottom.
Instead, try going in from the top. Take the keyboard off (there are little latches for the keyboard above the escape, F6/7, print screen, and asterisk keys) and you are presented with a metal plate with some kind of plastic on it, as shown in the picture:
You can click on this picture to get a larger view. You are presented with fourteen screws, plus one. The screws are of differing sizes, so make certain you map out where the screws came from. Also note these screws are the type that strip easily. You will have to unscrew all these screws to get past this metal plate.
Now, the part I would like you to consider is the one I have circled in green up top. I will zoom in on it for you:
If you will notice, there is a sticker on the final screw. This is by no means an accident or coincidental. If you tamper with this sticker, you will void your warranty completely. If you don't care, remove the sticker and proceed. If you're like the guy in the movie "Catch Me If You Can", you may be successful in forging it later.
However, I don't care to void my warranty for this cause. Therefore, I will surmise and tell you the rest. After you remove this section, you should have a black wire between the upper right second and third screws. You will also have to contend with that copper wire in the picture to the left. I still wonder its purpose. Perhaps it is for power or to connect the LCD? I doubt it's part of the system bus because it would be on the motherboard if it were so. I don't know, but it looks like you'll have to contend with it.
Your fans are in the slightly raised portion on the right of the first picture. There seems to be some sort of metal shielding separating the fans from the metal piece you just took off. You will need to remove this shielding. After this, you will be at the fans.
Please take care in this process and make certain you do not discharge static into the motherboard. Please make certain you have everything else unplugged from the laptop while you do this. A procedure such as this does not require the battery be removed. I hope this has helped you. I am still wondering why you are replacing the fan and not letting Sager do it. Unless, of course, your warranty is already void...