Mining new private alt coin derived from litecoin
I'm not the most familiar with altcoins, but...


Yes, I'm pretty sure you can. Because basically you're mining blocks using the info from your node, so I don't see any harm. I've never tested this, because i'm too lazy and I don't see a point in making my own altcoin. So don't quote me on this.
Scrypt doesn't require OpenCL. If i'm not mistaken, OpenCL is mainly used to allow GPUs to mine.