Do I need to do anything specific when I replace the spark plugs on my 05 VZ alloytec because I have your 12mm manifold insulators installed and don't know if I should remove the intake manifold differently to avoid damaging the spacer? Also do I need to

Remove it off the way you normally would, except with more force to break the silcone seal. PLEASE make sure that all of the bolts have removed before you do this to avoid any damage. This is correct. However you'll need to clean the mating surfaces of any old silicone prior reapplying the new silicone.