I am glad to say that (finally) I found a way to run Tiger Server on my aluminum MacBook... I do so via VMware Fusion 3...
It seems that Apple explicitly forbids to virtualise the "user" version of their legacy OSes, but NO the server version of them... surprisingly, Parallels do not implement such a possibility while VMware does...
That is a good reason —at least to me— to go, from now on, with VMware instead of parallels.
Once the server was installed, can we hack it to run also the "user" version?
Let us try...
(I'll be back with more on the subject later ;^)