How to control my fan with Rivatuner without creating profiles.

I have an HP DV2500 laptop with a Geforce 8400M GS (NB8M-GS) Graphics Card. It only has 64MB of GDDR3 RAM, but it gets decent fps in most games. Core Cloock: 400Mhz, Mem Clock: 600Mhz. The problem is that it overheats whenever I start to play a game. I have to stop every 15min to let it cool down. I once let it get to 90C. I have tried many things to help the cooling, but nothing seems to help.

I got Rivatuner to set the fan speeds to 100%, but it won't let me. Under system settings there is no fan tab. I was wondering if anyone knew how to set the fan speed to 100% using the "Power User" tab. I know that there has got to be a way, but I can't figure it out. Please let me know if anyone can tell me.

Again, there is no fan tab in system tweaks. I have tried versions 2.11 and 2.08. I assume that it because I'm on a laptop. Also, if anyone knows another program that may work for me, let me know. Thanks.