Is it possible to get root accounts in private ripple?

[eddynm]

I was exploring rippled to see if it fits my use case. I have prior experience with Stellar network where I created private nodes, and was able to get a root account with 100bn XLM[ of course it was not connected to main stellar network], but I was able to perform all operations there, it was like fully working mini Stellar network.

I am wondering if same is possible with rippled? I checked that in Standalone mode only, we get 100bn XRP, but if we want to connect it with another private server, it will not work I assume.  I saw a hardcoded network/passphrase "masterpassphrase" , if I change it, will I get a root account with 100bn XRP and configure another rippled with same passphrase & make it peer, will it work?

I know it may not make much sense, but if anyone has an idea, help will be appreciated... Also, how would rippleLab got root account with 100bn XRP in first place?