Litecoin CPU ScryptMiner
Download
http://www.mediafire.com/?l8i99fbyn41n97a
I have an i7 getting 40 k/Hash which is not too bad
Considering that with cgminer config correctly you will get an k/Hash result similar to the M/Hash result for your GPU mining activities
Check this out for an complete guide of what your outputs should be using both reaper & cgminer
https://bitcointalk.org/index.php?topic=117221.0
I think that given i5 cpu and lots as in 30 that u have @ your disposal then LTC should be a goer
mrb stated that with correctly configered s/w LTC & BTC mining should be on a par of ~ 0.0041/0.0040 BTC/LTC per hour for (600 m-Hash BTC/600 k-hash LTC) GPU card setup
https://bitcointalk.org/index.php?topic=131809.msg1414530#msg1414530