So how do you set up up the local config file if you want to set up more than 1 masternode? obviously you can just us the genkey and ouput number of one masternode cos it will conflict with the rest.
You can generate new masternode genkey for each of your MNs. I do in this way and all my MNs work
Nodes and Masternode count is doubling daily

Where do you see that info? My wallet doesn't show the amount of MNs. Blokexplorer doesn't show such info too. Devs told that such services as mn.zone will be in the future.
If you go to tools -> information it will show how many masternodes are online (currently 211). And yes we will actually have a custom masternode stats website live shortly

Can I do it instead of you?...

Yeah... we have
http://posq.mn.zone/If your port is red, you need to delete "listen=0" or make it "listen=1" poseidon.conf on your VPS server