i dont think it would work well. a 57mhz controller has a 57mhz crystal in it but it also has circuitry built around that frequency and characteristics might be different than say 49mhz. but its not that hard to try so why not if you are bored.
i'm goin 2 try when i go home..i found a old controler that i packed away along time ago it has one hell of a attena on it..i'm tryin 2 get over 60 ft range..