Sorry, the 15-100 is too old to have a setup code for the BDP-120. The UEI codes that work are Video 0142 and 2442, and these are available in the RCA RCRP05B ($20 at Walgreens and Best Buy) and the OneForAll URC-8820N and 10820N.
0142 is also available in the now discontinued Radio Shack 15-133, 134, and 135.
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