This sounds like an easy recipe for making your own rice noodles. I'll have to give this a try.
http://asiarecipe.com/ricenoodles.html
Making Fresh Rice Noodles
Makes 1 Lb.
1 1/4 cups uncooked long-grain rice
1 1/4 cups water
Vegetable oil
1. Soak the rice overnight in the water. After soaking, grind the rice and water for 5 or 10 minutes in a blender to form a very smooth thin batter, (A food processor won't work for this.) When done grinding, you should be able to feel no more than the slightest hint of solid particles if you rub the batter between your fingers. Better too smooth than not smooth enough!
2. Lightly coat an 8" x 8" x 2" baking pan with oil and heat it for about 3 minutes in a steamer. Pour in 1/2 cup batter in an even layer and replace the steamer lid. Steam for 5 minutes. From this point on, check to make sure there's water in the steamer. Add boiling water as necessary if it's low.
3. After 5 minutes, coat the top of the first layer lightly but thoroughly with vegetable oil and pour 1/2 cup of batter in an even layer on top of it. Again, steam for 5 minutes. Repeat with the remaining batter. After adding the last layer, steam for 8 minutes. When sliced, the layers will separate into thin noodles.
4. Use immediately in any recipe calling for fresh rice noodles or wrap them tightly in plastic wrap and store in the 'fridge for up to 2 days. They can be frozen for up to 6 months, but will be grainy when thawed.
Recipe from "Thai Home-Cooking from Kamolmal's Kitchen".
Here's another version with a video and photos at the link to go along with it:
http://neckredrecipes.blogspot.com/2008/03/homemade-kway-teow-steamed-flat-rice.html
Makes 8-9 pieces (½ kg)
Ingredients
150g rice flour
1½ Tbsp Wheat starch flour
2 Tbsp Corn flour
400ml cold water
1 Tbsp Oil
½ tsp Salt
Method
1. Mix the rice flour, wheat starch and corn flour together. Add the water and stir continuously.
2. Add in the oil, salt and mix thoroughly.
3. Set the batter aside for at least an hour.
4. Prepare your steamer.
5. When the water is boiling, ladle and spread a thin layer of batter onto the tray. Steam for about 4-5 mins on high.
6. Remove the tray from the steamer and leave to cool slightly (I leave it on a tray of ice cold water to quicken the process) before using a scrapper to fold the kway teow.
While waiting for the kway teow to cool, put in the next tray to steam.
7. Cut into thin strips for fried kway teow. The noodle sheets can be kept in airtight containers in the fridge for a day or 2.