For HD32778 and HD91204 the detectabilities help little in constraining the companion and hence almost all our knowledge is drawn from the SDI images. Therefore, we can say that these stars do not host cool methane objects, out to on-sky separations of similar to 2", with contrasts less than 10-11 mag. However, for HD25874, HD120780 and HD145825, the contrasts and detectabilities can rule out a number of possible solutions, particularly at low angular separations, and for the best case, down to strong methane masses of 40 M(J) at 1" separation. The contrast curves constructed for these five stars show 5 sigma contrasts (Delta F1) of similar to 9.2-11.5 mag at separations of <= 0.6", which correspond to contrasts of similar to 9.7-12.0 mag for companions of mid-T spectral type. Such limits allow us to reach down to 40 M(J) around fairly old field dwarfs that typically constitute high precision radial-velocity programs. Finally, the analysis performed here can serve as a template for future projects that will employ extreme-AO systems to directly image planets already indirectly discovered by the radial-velocity method.