You didn't save a copy of your downloaded installer for emergencies like this? Bet that won't happen again.
Follow tghe directions onth page EXACTLY or it won't work. The trial installers are the same as the regualr version, just enter your serila number when asked (do you have that?).
Peter, FYI, I'm not sure that link is as good as you may think.
I recently wiped my HD and installed a new OS (from 10.4 to 10.6). I had backed up my CS3 download installer to DVD when I got it in 2008, but for some reason, I couldn't get the installer to work when I put in on the newly-wiped drive. I remembered that you had suggested this particular link recently, so I tried it, but it didn't work for me. I clicked on the link for Mac CS3 Design Standard, and after signing in (as requested), it took me to the Adobe downloads page where only CS5 was available.
Fortunately for me, I tried loading from my backup DVD again and got it to work. I'm not sure why it didn't work the first time, but I probably just made a mistake. I suppose I could have made a similar mistake in trying the download from this page, but if you would care to give it a try, maybe you can verify that it really works.
It's been a month or so since I tried using the link, but it was working the last time I checked. When poeple report that it didn't work, in the past it has always been because they didn't follow the directions on the page exactly. Did you follow the steps in the section marked "Note: Very Important"?
It is not completely clear from the original post, but are you saying that you had copies installed on two different computers?
Adobe does allow a second installation with the qualification that one one copy can be used at the same time.
So the attempt to register a third time (same computer, new hard drive) may not work.
Normally the procedure is to deactivate a copy before attempting the new installation to stay within the 2 copies limit. Help menu - Deactivate.
Obviously since your hard drive died you can't deactivate.
In the forums other people have had this problem and the recommendation was to call Adobe and explain that the hard drive died and you can't deactivate a copy.
It is my understanding that Adobe can reset your activation limit.