Dvd+r to dvd-r


as am allowed the stupid q, here goes: been trying to covert my drive from dvd+r to dvd-r with no success and from what i read it seems tough (impossible?).
i ll be gratefull for any input.

If your drive writes only one format [DVD-R or DVD+R], you have very slim chances of using the other format. Very few models can be successfully crossflashed to support a different format [in this context].

What drive do you have?