How is it possible to upgrade from OS x 10.4 to OS X Lion

I wish to install the latest MAC OS X version on my MAC PRO running at now a OS x ver 10.4.11. Probably I will need some distinct steps but I don't know if it is possible and convenient. Has anyone installed the Lion version starting from an old  OS X 10.4 version?
Best regards
F.Scognamiglio

you can jump, you just can't "fly" Lion w/o for some insanity.
Note: there will be no support for PowerPC, no Rosetta.
Make sure your software is ready. RoaringApps has an app for that!
System Profile and Activity Monitor can help spot "PPC" also.

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