Thanks for the input.

I have no worries with the images associated with the text: i can resize them or move them in the word page at will.

Exporting directly to pdf isn't an option, as i will endup with exactly the same uncentered margins and slightly different page sizes as i do in word. And acrobat pro hasn't either an option to automatically center the content through cropping.

You mentioned macros: can it handle my problem of uncentered content ?