This is a customising issue that must be done at a template level. It's actually not too hard to do basic customising.
Rather than attaching your existing methodology or specific work-papers for specialised types of audit work by way of uploaded attachments it is actually worth investing a bit of time and training if necessary to create a custom job including your pages or work items. Once this has been created it may be used for other jobs as well.
See article on customising.
We also offer a service whereby we take your existing work-papers and create AA versions for you. If these are for a specific job type and you are willing to share this expertise with other firms we my do this for free. if you wish to keep it within your firm we will give you a quote for doing this work.