To create a wallet, if you have only a survex file and nothing to upload into the wallet, you currently need to got to Upload Scans, navigate to the new wallet number and then upload a dummy file, e.g. 'nothingyet.txt'. You can then edit the wallet details: the date, the people involved, and the url of the survexfile which you will already have uploaded using e.g. /survexfile/caves-1623/290/mynewsurvex.svx (for a survex file for cave 1623-290).