I have power mac g - 5 10.5.8 and I want to install snow leopard lion to reach as I do

HI,

A G5 computer is not capable to running Intel based OS versions.

Snow Leopard is the first of the Intel Only Software (See Wikipedia)

UK Apple Store >Snow Leopard> Overview

9:15 PM Saturday; March 2, 2013

Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

 iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.2)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images."  No, Seriously