Log in as another user

[kersti]

I tried to search for this - but unfortunately I couldn't find a useful way to phrase the search terms so that they had more than 4 characters per word!

I have a number of users who need assistance with things and I've been logging in as them and then changing their passwords - so then they need to change their passwords again. It's a minor thing, but causes some problems.

What would be better would be the ability for admin users to be able to log in as another user and not affect their password settings. I'm sure I've seen a mod for this somewhere - can anyone point me to it?

Many thanks for your help.