I'm sure some people have tried mounting floor standers in walls/cabinets before, but that would compromise the sound for sure. The wall itself would likely create a huge baffle and probably boost the higher freqs, not to mention the porting problems in the lower bass.
I believe the point that Alan was making was that there are design differences in the crossovers between the in wall and the stand alone towers but the goals in the end result remain the same. Your speakers will likely sound better than they do now once they are installed in the way they were designed.
Let us know how they sound once they are mounted, a lot of us are curious about your install.
