Yep, that looks about right. When you switch the RAID on it won't list the drives as master/slaves any more anyway
Remove all your HDs (and any USB drives) during the initial install...it makes sure you're installing on the correct drive and won't put any system files on your other disks. Plug them back in once installed.
Now for the bad news, you're probably going to have trouble with TRIM.
I'm not certain that the RAID drivers (even the MS standard one) passes the TRIM command. Wiper will work with the standard MS driver, but very very slowly, we're talking hours - maybe a day - versus minutes in pure AHCI or IDE modes.
Secondly, you should really install the Intel Matrix Manager software/drivers as this will give you feedback/status on your RAID1 - a positive is that it will allow write back cache to be enabled which increases performance a bit.
I know you've been waiting for TRIM before using the drive, but with this config it's not going to run until Intel provide some RAID drivers that support TRIM.
The good news is that Crucial have said that the next firmware will include both a TRIM version and a GC version, so the GC one will be the one for you to go with.
The only other alternative is to leave your ICHxR in AHCI mode and move your 2xRAID1 drives to another controller onboard if you have it or a separate PCI/PCI-e RAID controller.
Sorry to be the bearer of bad news...if it's any consolation I run 3xSSD RAID0s without TRIM or GC
