Hello Mattew,
Please look at http://scn.sap.com/docs/DOC-56166
There is a presentation on the above link that will detail to you how to add a custom app to the fiori launchpad.
Hopefully it will be of some assistance to you.
Kind Regards,
Grahame Collins
Support Engineer
SAP Product Support
Fiori SCN http://scn.sap.com/community/fiori
All things FIORI http://scn.sap.com/docs/DOC-41598