Laptops :: Laptop stops when using DSL

I'm currently remastering dsl to make the project echelonlinux.org
I use a laptop to remaster dsl.
I boot via a dsl cdrom,
I mount a partition containing my remaster,
and when I run mkisofs to build the KNOPPIX image, my laptop is like overheated and it stops.

But When I run my "normal" system on my laptop, (it's a debian sarge), I can run mkisofs without any problem.

So Maybe the problem comes from the dsl kernel ? I have no other idea..
Maybe someone could help me to solve the problem
Thanks for your answer .

original here.