Increased anteversion is believed to be a contributing factor for knee injuries, as the internally rotated femur typically causes an increased valgum at the knee (your knees end up in, almost knock-kneed), add this with an increased Q-angle typically seen in women which decreases vastus lateralis effectiveness and you have a recipe for ACL tears. Valgum position plus attempting to decelerate is one of the mechanisms for non-contact ACL tears. For the weight room it depends, it can surely effect squatting and any plyometrics that you might be doing. Make sure to cue her to keep her knees out if your going to be doing any landing/jumping activities. As far as correction goes, its hard for me to really give any suggestions sitting behind a computer. The first thing to do would be to see if see can self correct. My guess is that standing with her feet straight (if possible) will feel awkward. To improve you would most likely have to combine improving femoral external rotation via stretching of the internal rotators (figure 4 above 90 etc) in conjunction with external rotation strengthening. Again, the pathology is most likely bony and may only be partially correctable. You also have to consider if you do attempt to correct her deviation you might expose the joint to forces it is not accustomed too, placing her at risk for other pathology.