Yeah, you care to expand on that?
Sorry about your luck with the other pools.
My experience has been the opposite and yes you could always tweak cgminer every time you changed coins if they were different enough.
The easiest solution I can give is to find your graphics card in
http://litecoin.info/Mining_Hardware_Comparison list <--that list.
Then look for the one with the highest hashrate and try those settings.
--as CGMiner runs, watch the "HW:#" value at the top...that should always be zero, if not then tweak the settings till they stay there(run overnight at least)
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I used to get a Butt Load (126 Gallons) of errors which resulted in a low reported hashrate and a lot of bad shares...