Prepending to fixed length

FROM : Trygve Inda
DATE : Tue Jul 18 21:43:55 2006

I have an int that I want converted into a string but I want it prefixed
with zeros to a fixed length. So.

1 = 00001
2 = 00002

534 = 00534

Basically the opposite of

stringByPaddingToLength:withString:startingAtIndex:

Is there a method to do this directly?

Trygve