Does anyone know who to install a regulator spring for a power window? I have it in but it's not under tension. Window goes down real fast and comes up real slow.

my guess is exaclty opposite of how you have it installed.  flip it over...

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http://www.vetteprojects.com/bmv

Window regulator problem solved!
I did not have the spring wound properly. This time I put the regulator in a bench vise and wound the spring. With the spring under tension, I install the window motor which held the spring tension while the unit was reinstalled in the door along with the glass. One note, I had to remove the inside and outside weather stripping to make room for everything to go back in.