[Haskell-cafe] How to use roots package?

Hi Café! roots (http://hackage.haskell.org/package/roots) is a package to solve equations like "f(x)==0". In RootFinder class there is an 'defaultNSteps' value, which is used as maximal count of iterations functions like findRoot and traceRoot can make. By default it is 250, but sometimes it's not enough. How can I use another value instead of 250? Should I write my own RootFinder instance, or findRoot function? Thanks in advance. — Artyom.