Thanks for the detailed procedure. For my situation I changed the ramp rate from 2 sec to 4.5 sec using your procedure. On the ISY admin page I look at the device list and find my two switches, master and slave - both set at 4.5. The scene has the same ramp rate of 4.5 along with both switches in the scene (using the procedure above of copy).
If I activate the scene from the computer it works with a ramp rate of 4.5 sec. If I push the master switch it also does the ramp rate of 4.5 sec. If I push the slave switch is does the standard ramp rate of .1 even though everything shown says 4.5.
For this particular switch combination, I added it to the ISY via the master switch device address (I can't get start linking to work properly) but in this case I added the address and chose option to add related devices (switches linked together switch to switch in a virtual 3-way) but to remove existing links. I was thinking that this would remove the hard link switch to switch and have the ISY create new links via the scene.
Maybe my problem is that these switches were linked together using the standard insteon linking and this link was not removed.
Also along the same lines, what is the priority for operations - ie local first, scene second. Even though the ISY device list the local action is to use a ramp rate of 4.5 can it still be programmed locally from the original set up as an virtual 3-way linked switch to switch with the standard ramp rate set?
Thanks.