Hi Jeff.

To get the cockpit sounds in the CS 727 I have two ways of doing it.
1. I reload the aircraft, ALT > Aircraft > Select Aircraft > ENTER (I use a keyboard shortcut of CTRL+R).
2. I load one of the default CS727 flights, 727-100 Cold-n-Dark (KSEA) or 727-100 Cleared for takeoff (KSEA) (you must select the corresponding .FSSAVE file) from Documents\Flight Simulator X files by double clicking it.

For my CS757 sounds, I use IRIS - AudioworX 757-200 Soundpack for FSX. This does not specify which engines these sounds are for, but the instructions demonstrate for the sound.RR, so I did.

I unpacked it to FSX and it installed the sounds to [FSX root folder]\IRIS AudioworX\757-200 sound-pack.
I then copied the sound.iris folder to [FSX root folder]\SimObjects\Airplanes\CS_B757-200\.
Then I opened the aircraft.cfg for the 757-200/300/200F, and edited the sound=RR, or sound=PW, to sound=IRIS. For example:

[fltsim.0]
title=Captain Sim 757-200 FSX 0
sim=cs757-200
model=PW
panel=
sound=PW
texture=delta
kb_checklists=
kb_reference=
atc_id=N675DL

[fltsim.0]
title=Captain Sim 757-200 FSX 0
sim=cs757-200
model=PW
panel=
sound=IRIS
texture=delta
kb_checklists=
kb_reference=
atc_id=N675DL

All you have to do to change it is in the instructions that came with the soundpack. I did the same thing for the CS767 and the TSS Sounds for the GE, PW and RR sounds. Unfortunately the TSS sounds are really for FS2004 (FS9) and not for FSX like the IRIS - AudioworX 757-200 Soundpack for FSX is.

Hope this helps.

Mark