Adds a piece of salvageable debris to a ".level" file.

<sChunkType>: the type of debris. Ranges from Slv_Chunk_Lrg01 to Slv_Chunk_Lrg05, with 1 being the smallest and 5 being the largest. You can also put in Slv_Chunk_Sml01 through to 08.
<tPosition>: a table containing the X, Z, and Y coordinates.
<fRU>: a multiplier applied to the default RU amount contained in each debris type.
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