Hi Gilbert,
modETP is a modification of ETP1.0 without upgrade scripts. I don't actively maintain it anymore although some parts will be moved to ETP2. ETP2 is the real successor. modETP was a wack a code solution for a marketing/sales need. Although modETP was good enough to be used for some production or soon to be production sites.
If you have time I would encourage you to help out Dave for ETP2 as I am unable to. DaveB is alone on this one as I think Luke P is also busy.