I have the same problem with cgminer crashing with the --scrypt flag and 13-4 drivers.
With 13-4 drivers you do not need any sdk for opencl.
For those that want to change their driver in a clean manner without reinstalling a new os just use this wonderful tool :
amd_cleanup_util_1.2.1.0
I just found out I never responded here. This cleanup tool resolved all my problems (at least with regards to Scrypt mining
). Thanks!