Thank you guys!
I will do that in Canada. Also I could guess your answers before I set the post... before I had taken a look to the normative, I didn't see anything which stablish that with IFR rating, only I can fly single engines aircrafts.
Maybe it is in another place of the regulations. Just for information, I've checked that in the part of crew licensing of Canadian CAR's.
Thank you again!
Joaquin