Is the Europass format CV widely used and accepted?Yes, either a national-style or European CV may be submitted, as long as it is targeted, clear and well written.
Is there a preference for handwritten applications?No, the most common way of applying in Latvia is with a typed covering letter.
Is it standard to include a photo on the CV?
It is up to you whether or not to include a photo on your CV. Some employers ask for a photo, especially for positions where work is related to customer service.