First of all, you have to develop the flexibility to grab the bar in the racking position.
Some ways to do so are simply stretch your wrist and make it go through as big a range of motion as you can by rotating it in both directions. Check this out
http://stronglifts.com/how-to-stretc...at-experience/
Stretch your triceps as well. One way to do so is to lift your arm overhead and bend the elbow. Use the other arm to pull the elbow downwards and inwards to stretch the tricep.
Another way is get into the racking position with a loaded bar and grab it with your hands(might not be possible in your case so just use the fingers) and have someone push your elbows up slowly. Try to get the elbows as high as possible gradually and of course, grabbing it with the palms. An alternative for this is put the bar on the back instead; on the traps. Do the same thing.. Get those elbows up.
Do these a few times daily for a few sets of 20-30sec and you will gain the flexibility quickly.
For sub-maximal lifts, you will be able to drop the bar from the racking position to the thighs by doing this
http://www.youtube.com/watch?v=L0qUIn4BwWM Forward to 2:33
For max lifts, you are going to need a proper platform which means a weightlifting club/facility.