  We study boost and space-rotation transformations in kappa-Minkowski
noncommutative spacetime, using the techniques that some of us had previously
developed (hep-th/0607221) for a description of translations in
kappa-Minkowski, which in particular led to the introduction of translation
transformation parameters that do not commute with the spacetime coordinates.
We find a similar description of boosts and space rotations, which allows us to
identify some associated conserved charges, but the form of the commutators
between transformation parameters and spacetime coordinates is incompatible
with the possibility of a pure boost.
