@ Ramon:

According to my knowledge it is impossible to implement the "TRIM in RAID0" feature into 6-Series chipset systems by simply "modding" the Intel RST driver.
You cannot convert any hardware specifications like the Intel SATA RAID Controller by editing any driver file. Furthermore the Intel SATA RAID Controllers of 6-Series and 7-Series Chipset mainboards have exactly the same DeviceID and are using exactly the same RAID driver. What do you think can or has to be changed?
My opinion:
Users with a 6-Series chipset and an SSD RAID0 probably have to wait for a future Intel RST driver/OROM combination, which originally lets the TRIM command pass to the SSD members of a RAID0 array.