It looks from the first image that you had a failed RAID array that RST thinks is still there, but in a failed state. Then you've got two separate disks that only one is used (Member Disk(0)). Windows Disk Manager still sees the phantom array too. That's the unallocated 931 GB disk.
This suggestion requires deleting and reinstalling the OS! What I would do, but it's a lot more work, would be to clean the existing disks to start fresh. Delete the old RAID volume in the storage config (ctrl+I). Create a new RAID 0 volume in the storage config (ctrl+I). Download the F9 drivers from the Rapid Storage support website and use them during the OS installation when you're asked for a mass storage device driver. You use those drivers to enable the OS installation to see the RST RAID volume and install there. Otherwise you're just using embedded OS drivers and, from your description, it doesn't recognize the RAID volume.
The PXE screen usually means there isn't a bootable device available, or that your boot order is messed up. Check the boot order in the BIOS and set to a good order, i.e. CD or DVD-ROM, OS HDD (or RAID controller/volume)... How do you get into Windows if it boots straight into the PXE screen?
I am just telling about PXE boot order.
Go to BIOS (press F2 at System startup) Go to BOOT Menu. You will see the Boot devices list.
Disable "Boot from Network" and disable "Boot from USB" or "PXE boot" (something similar)
The first device to boot from should be your hard disk(s).
Press F10 to save and exit