Between your 36Gb and new generation raptors with 16mb buffer and other minor advancement, at raid 0 you won't be seeing any big difference. You'll be better off configuring that 2x36Gb Raptors of your to raid 0. Use another seperate 7200rpm for backup and storage.
I use my 2x74Gb Raptors Raid 0 for gaming and yes it gives me faster loading times on my games like 2142 and BF2 and FEAR, etc. With raid 0 you can definitely see some several seconds shaved off during load times and boot, depending on the system.
For I use 124K stripping size for large gaming application and gives me the fastest loading times overall.
Also here's some tips you can make loading faster on Bf2 and 2142.
Make sure you have only one cache folder in your game document. This is used in optimizing the game's graphics according to the graphics card setting. Make sure you have only one setting.
You can check this by:
1. Start
2. My Computer
3. My Document or (your name) document
4. Open the game BF2 or 2142
5. Mods
6. BF2
7. cache
There you should see the cache, and if there's many of them then delete them all. When you play the game again, it will optimize again and will save the cache once more. Finished the loading and exit the game and check to see if it's only one. Defrag the drive.
Another way is to set the game application priority to high. You can do this by running the game. While the game is running, Ctrl + Alt + Delete, this will minimize the game screen and go to main window and the Task Manager should be open.
Now at the Task Manager, click on the Process tab. Locate the game application and right click on it. At "Set Priority" select high. It should give you better performance and faster loading. But this will not work on all computers and even slows down some. So if it doesn't work then just set it to it's original setting.
I don't think this priority setting will be save and you may need to set the "Priority" every time you run the game.
Also at gaming, higher quality and resolution setting will increase the loading times.
Now as for my system:
2x74Gb Raptor Raid 0 124K stripping
2Gb ram
3.8Ghz Pentium D
and using them tips above for gaming
With 1280x1024 high settings at BF2 I get about 20seconds first load and about 15 seconds on following loads on maps. For the comparison on my regular Western Digital 7200rpm 300Gb Caviar SE hard drive, it gives about over 1 minute first load and 50 seconds seconds following loads.
So for you, configure that raptors to raid 0 and see if you have good loading times. And do the tips above and run some tests.