Version problems from Steam and PBW Updates

[Dan_]

Howdy,

I'm involved in a pbw game which is currently on hold due to some of our players having their SEV version automatically updated to v1.58 by Steam, a version not compatible with the mod we're using (Balance Mod 1.09). I'm trying to work out what our options are at this point and how long we can expect to have to wait for a compatible version on pbw so we can decide what to do.
I've heard Balance Mod 1.09a should be available soon (21ish/10/07) which will allow us to continue our game on SEV1.58.

How long does it usually take for PBW to be updated with new mods and versions?

Can anyone tell me if (and how) Steam users can install the previous version 1.44?
(I've read in another forum how to turn automatic updates off, but that won't help us now.)

Is there a way to install and run multiple versions of SEV on the same PC?