1st. the sources are the real one, confirmed.
2nd. in case that you dont know how to use them then someone will destroy your server inside some minutes, there is an exploit.
3rd. you can modify a lot of things but in xase you want to do nore hardwork you will need an IDA databse too.
4th. about the one who wrote that vang last dll was 8mb, use your brain and check up the sources, vang is doing somthing after he builds the dll.
5th. i recomend to change some keys before use them cause it will be really easy for someone to bypass your protection(in case you will use this cliext.dll).
6th. i reccomend everyone who use the latest vang dll to find someone who can setup these sources for him cause soon or later will have problems...