Great guide thank you.
Using Sapphire R9 270X I'm managing a steady 147 Mh/s with gpu temp at 64C and still able to browse and play web based card games without any lag.

cgminer --skein -o stratum+tcp://*pool:port* -u ** -p ** --no-submit-stale -I 10 -g 2 -w 64 --gpu-engine 1100 --gpu-memclock 1000 --thread-concurrency 8192