If you don't want to run a bunch of cpuminers, I have posted modified cgminer sources to allow LTC-only mode: https://github.com/dtbartle/cgminer-gc3355. I have this running on a Raspberry Pi with 10 devices.
Thanks CH... Does it work with Ras. PI only or I can hook them all up direct to your cgminer via usb hub?
Not sure I got the question right...but what I am using is a Raspberry Pi (with Scripta) and D-link USB Hub where I plugged a gridseed 5 chip miner (I believe you could plug more units...but I have only one...sadly!). Is not my cgminer...is Andareed version!