Hello kabolz,
Let me help you with this.
When trying to setup a RAID with Intel® Rapid Storage Technology it is necessary to have the chipset mode set as RAID. This is the only way to have the CTRL-I BIOS enabled.
I see you have installed Windows 7 on AHCI mode already so you will need to set the Chipset mode to RAID and reinstall the Operating System.
You can create the RAID volume by pressing CTRL + I keys when booting or you also can use Intel® Rapid Storage Technology to create the RAID volume from the software.
Here you have the Intel® Rapid Storage Technology user guide:
http://www.intel.com/support/chipsets/imsm/sb/CS-020670.htm
Kevin M