Yeah, I recall being really confused when I discuvered that the retail version doesn't save, but the rom supports it perfectly.
I'd just left the save type as AUTO, and thought it was working, but it's posible that I've not beaten any scores...
I've been using an EF Omega DE since Christmas, and also use a EF IV.
I've noticed a recent issue with one game in particular, Pimball Challenge Deluxe. The SAV file transferred over from my EF IV with no problem, and I've been able to use it...
The problem with X party blocked X bill that would have prevented X is that yes the bill probably would have worked great, buuuttt they put XYZDCBG in said bill as an attempt to sneak things in that tend to be completely unrelated to the original bills intent. It sucks because if they would just do a single thing they could probably get something done...