Hi Baygun,
You can copy the ENTIRE iPhoto Library folder to the new G5. Make sure it has a different name before you place it in the Pictures folder so it doesn't replace the library that is already there.
Launch iPhoto with the Option key depressed and choose to open another library. Navigate to the library you just copied over from the PB and highlight it, then click the "open" button.
Copy iPhoto Library folder from one Mac to another
-If the library is small enough, burn the ENTIRE iPhoto Library folder to CD/DVD.
Drag the iPhoto Library folder from the CD/DVD to your Pictures folder of the iMac.
-If the computers are networked, copy the ENTIRE iPhoto Library folder to the Pictures folder of the other Mac.
-If you have an iPod, copy the ENTIRE iPhoto Library folder to the iPod. Connect the iPod to the other computer and copy the iPhoto Library folder to the Pictures folder of the other Mac.
-If you have a firewire cable, copy the ENTIRE iPhoto LIbrary folder to the Pictures folder of the other Mac
Things to keep in mind:
-If the usersnames are different you might have to set the permissions on the iPhoto Library folder to Read/Write for the new user. Check the "apply to enclosed items" at the bottom of the "get info" window.
-If there is another iPhoto Library folder on the other Mac, change it's name so it doesn't get replaced by the iPhoto Library folder you are copying into the Pictures folder...or....drag it to another place on your hard drive.
Lori