Heavy concentrations of sugar in the water will act to draw out the fluids engorging the swollen everted tissue; this may reduce it enough to be inverted by the lizard. The tissue may be rinsed with fresh water and Betadine, and carefully pushed back in with a gloved finger lubricated with KY Jelly (the type without the spermicde). Extreme care must be taken in doing this as, if the colon contains fecal matter and the colon tissue is pierced in the attempt to replace it, severe, even fatal contamination and injury may result. If the soaking does not work within an hour, and you do not wish to attempt manual replacement, the iguana should be placed on a damp towel and taken to the vet as quickly as possible.
http://www.anapsid.org/prolapse.html

That's for an iguana, but again, i think it'll work