Are you running my rom? or a stock merit/avail rom, sorry to ask, just troubleshooting, before installing the theme, try going to storage and mounts in CWM and mount system, and then mount data, in that order, then install the theme. If it is still aborting then the theme is incompatible, though I dont see how this is possible, especially if you have flashed Speedfreak 1.3, thats what my phone runs and the theme works great for me, though admitedly, it still needs work.
Is anyone else having this problem, has anyone else tried to flash the white theme?