asha, even i have the same situation. My exams due in Nov'10 but i decided to appear in may with both the groups rather than to go with a single one by preparing it in haste.
Moreover its not the thing of mere appering exam and scoring marks. At this stage of final it is utmost important to make urself clear with the concepts so that u can use them very well when u have to face the real world.
So i advice you to go for a tharow study of subjects. Get equiped with all the weapons and then enter the battlefield of Final.......then its u to win...
Bye....Take care.