oh man... I have a couple of squash left from last year's harvest that need to be used fairly soon... you evil woman! 
Moonfroggy... I think they would work with the Ener-G egg replacer. I'm not familiar with other brands. If it were me - and this is speculating - but I wouldn't necessarily add the additional liquid to make it an egg equivalent, but I'd sprinkle the powdered egg replacer on the squash and mix it in thoroughly before adding the other ingredients - especially if you're starting with canned squash/pumpkin.
Speed comes from what you put behind you. - Judi Ketteler