AC Pack sound

Hi there, i've recently been trying a panel combination with the pmdg and feelthere 737 panel, using the overhead of the feelthere as even though not an ng, it does have better system sounds. When the packs are turned off in this overhead, one hears the AC fans spooling down to create that quiet before engine start. Unfortunately the feelthere and pmdg systems like autopilot have been confliciting due to this. Is there any way to stop the conflicts, or how can i edit the pmdg panel to incorporate such a pack sound system. I would very much appreciate any help. Thanks