Just so happens that I have said BYO here at work.
To convert any size recipe to any other size, follow the following example for all ingredients:
9.0 ounces of crystal malt (5 gallon recipe)
To convert to a 3 gallon recipe (or whatever), take the 9.0 ounces times the batch size YOU WANT and divide by the batch size in the RECIPE.
i.e. -----> 9.0 x 3 gallons / 5 gallons = 5.4 ounces of crystal malt.
That be it.
You may want to think about the amount of water you are boiling, since now you will more than likely be doing full boils as compared to partial, your hop and malt schedule might be a little different.
One more thing, a tube or smack pack of yeast is just the right size for small batches, so no starter required!
Primary 1: Empty
Primary 2: Empty
Primary 3: Empty
Secondary 1: Empty
Secondary 2: Empty
Conditioning: Tradition IPA, Sweet Mead, Strawberry Melomel, and Raspberry Melomel
Drinking: MW Irish Red Ale, Lawnmower de Saison
Planning: Maple Syrup Mead