A projector displays, together with an input image, an OSD image different from the input image. The sliding door panels are slidably movable on the track between a closed position wherein the sliding door panels are extended across the track, and an open position wherein the sliding door panels are constructed and arranged to be in a compact, overlapping relationship with each other and the fixed door panel. After regaining signal coverage, a wireless device monitors the control channel to decode and compare each broadcasted identifier with an identifier of the wireless device. When the blocks or discrete structures are placed adjacent to each other, such as when constructing arches, they absorb or dissipate the shock and vibration energies by having the sides of the blocks, and in particular the low quality materials within the blocks, in firm frictional contact. The insertion portion and housing portion are separable to decouple the pipes. By creating a generic RSS feed for receiving generic content items, the personalized RSS files can be pre-populated by copying the generic contents into the personalized RSS feeds.