I found my old copy of The Lost Crown but when I tried installing it, it is asking for a password.
I have the 2 CDs and the box, but I don't see the password. Must have been on the CD envelope, but I don't have it anymore.
Is there a way around it?

It should be printed on the front of your game manual.

Couldn't find it on the manual, but I found one on their website just now.....thanks!

Must be different versions then. Mine is on the front of the manual. Glad you found one that works on their website.

My copy has a little booklet attached to the box on the inside cover, but there was no code anywhere. Perhaps there was another manual inside the box, but i have lost it.

Did yours come in a DVD case or a box?
Mine came in a box. There wasn't any "inside cover" to the box and the code was on the front of the manual.

It came in a box. The front cover of the box opens like a book and there are 4 pages that are like a book, which is the manual, I assume. This is on the outside of the box. Then the CDs were inside the box. There may have been a case they were in originally, I can't remember since I've had the game for so long. I had just stuck the CDs in the box loose.

My box had the fold-out cover, but there was also a jewel-case-sized manual in the box. The CD's came in paper sleeves.

Mine (UK) was very slightly different in that it came in a standard (non fold-out) box.
But the disks were in paper envelopes, like Jenny1oo's, and the jewel case size manual does have the code on the front