The logo should be saved out as an EPS file from Illustrator. XPress won't import .AI files. Make sure fonts are embedded in the EPS if there are any fonts used.
As to your second question, you want Space/Align. Select your items and then go to Space/Align. I forget at the moment what menu that's on, but it's a standard command so it should be pretty easy to find. Then just tell it what you want to align the items by.
Erik Youngren
Composing: Pueblo Publishers
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