Beyond the warm props changing thier shoes for soft sole ones, try tighting the scews on the rostra tops & jionts. Also add extra bracing to reduce rostra movement.
Normally I skin the tops with calico [muslin] prior to painting.
With the squeeks squirt some lubricant [silicone based] on the likely areas. Most niose comes from the amplified drum efect of the open space under the  rostra, however by filling in the all the rostra sides with ply or MDF this will also reduce the niose from hard shoes.


Edited by JoeMc - 5/24/10 at 10:09pm

Our entire stage is covered in carpet, glued upside down... With the jute/plastic side up, we cover it with LOTS of paint. (Usually all our old scrap paint. This becomes a great painting surface, cuts down on noise and becomes a "self sealing" surface that we can drive screws into, remove and paint over after..... Something on a smaller scale may help with the footfall noise, but as previously stated, squeeks are wood on wood and you will need to try and support/tighten connections...

With painting rostra [plates] tops & stage decking. I add into the paint ordinary white wood glue, which dries clear, this also reduces the clip clop niose & wear 'n tare to the painted  surface.

You might also want to try sprinkling talcum powder or graphite (pencil lead shavings) over screws and wood-on-wood squeaks. Both are forms of solid lubricants that might diminish noise.