Source code
The source code is here:
https://github.com/coblee/litecoin
This is based on the latest Bitcoin code. You can either build the daemon version (litecoind) or you can build the QT gui version. See the build docs.
Similar to Bitcoin, you may want to create a litecoin.conf file here:
Windows: C:\Documents and Settings\
Win7: C:\Users\
Mac: ~/Library/Application Support/Litecoin
Unix: ~/.litecoin
To run against Testnet, you need to put "testnet=1" in your litecoin.conf file. Without it, the client will crash.
Port is 19333 for Testnet and 9333 for the real release. And default RPC port is 9332.
...
Have you tried to generate actual blocks with it yet using a miner?
I'll track down something that I noticed a bit odd once I know exactly where it came from.
It's forked from Bitcoin code base. Mining works.