Tough one, everyone is so different. I have tried training legs in different ways myself and it seems that genetics play a larger roll than the type of training. Having 4 days rest between hitting your quads should be ok but you only have a couple days between working hams. I know that none of my clients would be able to work their hams 2 days after training them hard. They would not be even close to recovered.

From looking at your pictures you are quite small in frame and musculature. If I were you I would try working the living hell out of your legs sticking to 8-10 reps to failure with big compound movements. If you feel they are ready to go again in 4-5 days you could work them again. I really wouldnt bother breaking the hams and glutes up so much, if you feel you have to hit your quads harder just incorporate movements that place more stress on them. You are also going to have to eat to grow. To be honest, the Canadian figure girls that actually get anywhere in the "sport" hold a lot more muscle than you all over. You need to increase the muscle everywhere not just your legs.

You should listen to your body and try a little bit of instingtive training. If it isnt sore, work it. An old rule of thumb is to eat big and overtrain, this can be done for 6-8 weeks. Then undertrain for a couple weeks to give your body a break and go back to a more typical training approach after that. You need to shock your body to make it grow.

Darrin