Hello,
I'm not sure what you mean by the "mental game", but one of my goal in TE2007 is to have the possibility to have one custom behavior per player. (so it'll offer more variety in the opponent strategies)
I'll let users to edit these behaviors, using scripts, but it won't be for everybody, as it'll be like programming...
Here a basic example :
If PositionWidth BiggerThan 5
and PositionDepth BiggerThan 10
and SpeedWidth BiggerThan 5
Then
AimWidth = -PositionWidth;
AimDeepth = 10;
EndThen
It won't be exactly like this, it's just an example out of my mind right now...
Anyway, in human language, it'll give :
if the player is 5 meters away of the center on the side (near the singles sideline), still near the baseline or more far than it, and he's running faster than 5 meters per second, then he should aim for a crossed strike...
It's really not complete at all like this, but it could be a start for a custom script to simulate the crossed-forehand of Sampras that he did so often when running on the side...
I hope it answers your question...