My dad as always told me the same, and he did it in XP as well. I've never really understood that however. I don't understand why you would need MORE swap as you got more ram, I would think you would require less.
However, if you look at what windows has set your pagefile too, it is usually larger than your ram. I have 384mb of ram, and XP sets my swap file to 578(?) to 768mb. I usually reset it to 384 to windows old lower limit.
I'm in linux now though and simply gave it a 2gb swap partition and said screw it.