HDD Question FSX

[Harris]

I have done a clean install of Windows 7 64 bit with a new WD Black Caviar 1TB HDD split in to two partitions, one for the OS system and programs and the other for data. I also added a WD VRap 150 GB SATA 3.0Gb/s for FSX and FSX Simulator Expansion Pack. I intend to run all FSX data files and add-ons in my data partition. Questions: What kind of separation provision for FSX files and addons should I make in my data partition, and please give me any advice as to what should go into the VRap HDD? I figured only FSX and FSX Simulator Expansion Pack. Thanks in advance.