I am having trouble figuring out the multi algorithm thing. I cut and pasted the example config file into a text document that I named sgminer.conf. when I start sgminer it says Fatal JSON error in config file and doesn't work. I usually use cgminer. I am running a single gigabyte 7950
last line in the example config isn't part of a working config, make sure you deleted.
Also, make sure everything has commas where appropriate.