Installing Maxima on mac ox s 10.4.11 (ppc processor)



Hi,
I need to install maxima on ibook G4 ppc processor running mac os x 10.4.11.
I tried installing all the maxima(version).dmg files but (after
successful download and unraring and copying to the applications
folder) when I doubleclick the wxmaxima, I get the message ..something
like  "  this application cannot open ...." and when I try to run the
Maxiam program
i get the message telling me that the system is not suitable for it.
If I need to build up maxima from source files...please kindly tell me
in simple steps what to download -the links- the lines I should type
in terminal.app because I have no idea about this!
Thank you so much ...

--
Ahmed Abdelhakim
Dipatimento di Matematica
35, via Machiavelli
44121- Ferrara (FE)-Italy