This video shows the configuration of an iTach WiFi module, and the creation of a new remote, beginning from scratch up to a working remote. (A second video using an IRTrans module is here):
(Click the video to pass the trailer).
For direct download: "iTach Config & new Remote" (H.264 Video, about 53 MB)
Optimized for iPhone: "iTach Config & new Remote" (ca. 32 MB)