The 990 docs explain that you can get an IR remote sensor that plugs into the back of the 990. Depending on the length of its cable, it may be the easiest answer.
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Current Setup:
Samsung HL61A750 LED DLP RPTV
Marantz SR5004 AVR / Outlaw 7075 Amp
L/C/R: Ascend Acoustics 340M/C/M
L&R Surrounds: Ascend Acoustics CBM 170
SVS 25-31PC
Panasonic BD55K Blu-Ray Player
Dishnetwork VIP722 HD/PVR.