Simple guide how to run 2 Chaincoin masternodes in Windows. Same PC, I already use it.

1. Setup 1st masternode.
2. Copy %appdata%\Chaincoin folder to %appdata%\Chaincoin2. Delete wallet.dat from Chaincoin2 folder. NOT FROM source Chaincoin folder!!!
3. Make rule on router - forward port 11996 to the same PC.
4. Start wallet with parameters: chaincoin-qt.exe -port=11996 -datadir=%appdata%\Chaincoin2.

You can use any other port instead of 11996.
With -datadir wallet will use you copied directory.
After start it will make new wallet.dat in Chaincoin working directory.

5. Take new address to receive CHC.
6, Generate new MN key by typing "masternode genkey" in console. Close wallet.
7. Open chaincoin.conf in notepad. Paste new key after masternodeprivkey=, replace you previous key.
8. Add new line to chaincoin.conf:
port=11996.

9. Send exactly 1000 CHC to you 2nd masternode address from step 5.
10. Start chaincoin-qt.exe -port=11996 -datadir=%appdata%\Chaincoin2
11. Wait for 15 confirmations, then type in console of 2nd wallet: "masternode start".
12. Make double profit, make more masternodes. Decrease earnings of all masternodes =).

You can start 1st and 2nd masternodes separately or together - now you have 2 different installations.
Maybe you don't need -port=11996 in command line if you have it in conf. Or maybe you don't need it in conf =).
You will have 2 Chaincoin working directories with block files, size will grow 2 times faster. Maybe there is a way to have just 1 set of blockchain files using hardlinks, I didn't try.

13. Make more masternodes, buy more CHC for it, make the price up, increase stability of network.