For a start you posted your query in a forum about using Bravenet products that are designed to be used with sites hosted with other companies. There are two specialist forums for issues specific to the two hosting packages that Bravenet sell.
Assuming that you have FTP hosting then you do it yourself following instructions from Opensis.
If you are using Bravesites then it isn't designed to have random third party products bolted on. The whole point of signing up for Bravesites is that it is a self contained package.