I've not tried mining with NeoScrypt myself so there's no out-of-the-box support. That said, you can theoretically add any GPU algorithm and any backend miner to the program as long as it is a CGMiner / BFGMiner fork.

Click Settings > Advanced miner settings > Advanced GPU miner settings



From there you can add new algorithms and assign a miner to them, along with the kernel arguments required to mine that algorithm.

If the miner you want to use is not listed you can add it yourself to the Miners\ folder found in the MultiMiner folder.