public static Umbraco.Core.Models.IMember RegisterMember(RegistrationViewModel rw)
    {
        var service = ApplicationContext.Current.Services.MemberService;
        var m = service.CreateMemberWithIdentity(rw.Username, rw.Username, rw.Surname + " " + rw.Name, "Member");
        m.IsApproved = false;
        service.SavePassword(m, rw.Password);
        service.AssignRole(m.Id, "Newsletter");
        service.Save(m);

        return m;

Here is my code. What I need to do is to set custom property values, but I don't find a way to access the member properties or the Profile Model.

Any suggestion?

Thank you