Once you have created a new link party, go to your Inlinkz dashboard and click to copy the code as usual. 

On the code dialog, copy and paste the first code and send it to your co-hosts (you can paste it first to a pastebin.com file, so as your code won't be modified while sending it). 

Note: If your co-hosts blog installastion is on wordpress.com, copy and send them the code for wordpress.com sites.