i have to enter it manually every time, which gets a bit frustrating when scanning a lot of pictures
from Epson dialogs
[x] Show Add Page dialog after scanning
If you are scanning a multi-page document using the PDF or Multi-Tiff format, select to display a prompt for scanning additional pages after the first page is scanned.
would that not help in keeping those settings?
using multi-tiff format you can use irfanview to split each file of grouped photos into seperate pages (see also batch commands to do other tasks such as rotate this bunch, sharpen that bunch etc)
hope that helps