重命名目录时stsadm差异备份？

currently I have a full backup running daily in SharePoint. The automated process for further copying, renames the full backup directory to backup_((date in yyyymmdd))_full. I'd like to rework to a daily incremental/weekly full schedule, but the differentials can't seem to find the last full backup to work with. I was thinking of further extending the batch jobs to record the SharePoint name and do a quick rename before the differential executes, but does anyone have an easier way? Thanks!currently I have a full backup running daily in