Hi, Although rather late I have a suggestion for your remote/extender problem.
My AV equipment (9.1 receiver, CD, MD, Cass, DVD-RW/HDD, VHS & Cable box) are housed in a cabinet and controlled behind closed doors with a Harmony remote using a range of fab products by "Xantech" - www.xantech.com
They have a huge range of IR receivers, emitters, switchers, modules & connecting blocks ranging from descreet (in a range of finishes to blend in), to almost invisible.
I use a microlink IR, a one zone connecting block with 4 emitter ports and, 4 dual blink mouse emitters. This allows me to control 8 components by sticking the emitter to the IR window of each component.
I purchased the Xantech system with a Smart remote 6 years ago. I have upgraded my remote for a fourth time and replaced many of the original components but the Xantech sysytem remains the same and, I have never had a problem with stray signals or any other associated problems.