If technical problems can be solved that easily, then I think there might be better reasons for them to leave out the scenes. The producers are probably the only ones who know... maybe you should write to them and ask. ^_^
For me, it's new cutscenes or nothing. The original cutscences simply focus too much on Dante. It would look very weird to have them appear in Vergil's game, even if they do tell the all the story. Besides, it's a bit tedious if you have to go through them all over again when you've already memerized every single line in the plot...
They could have rearranged Vergil's missions though, if they couldn't add new stages or anything. It kind of shocked me when Vergil first appeared in Dante's office... I almost thought the mission was going to be something like this:
Secret Mission: Clean up Dante's room in 30 seconds!!
Vergil: ............... *wipes off cold sweat and goes DT*