Overwriting the page file, even with all zeros, will make it unrecoverable unless someone takes a magnetic force microscope to the drive.
If it still worries you, a better option (if you don't have enough system memory to eliminate the page file) is to encrypt the file.
There are a couple of options here. One is CryptoSwap Guerilla. Another is to figure out how Truecrypt 4.2 (new version) can store page files on encrypted containers.