Hi Garry,
Theoretically at least, you should be able to do an import provided you have created a template containing the appropriate fields that need to be imported.
To figure out what needs to be in the template, you can go to Accounting > Accounting > Assets, create a sample asset manually and export the contents of the asset to an importable csv file using the export functionality. You can then use this csv file as a template for importing other assets.
Depending on your business needs, you may have to create one template for each class of assets.
Hope this provides you sufficient information to get you started. You can also refer to the following documentation that describes how to build/customize import templates.
Import FAQ