Today, I buyed Worms: Reinforcements for €0,50 (!!!)
I have already the original Worms game for my pc.
But when I put the CD in the CD dive (with the lowest letter),
then there come a blue screen with white letters: ''Put the orginal worms CD in the diskdrive'' (or something)
So I opened up the drive With Worms: Reinforcement in it, Put the original Worms game in it, but then? nothing. (I'm 100% sure the disk is clean)
Can someone please help me?

Check your PMs.

I have a similar problem:

I my young days I bought Worms and then Worms reinforcements. Later a friend of mine lost the worms CD (thanx mate), then I bought again worms under the Sold Out label, but this copy doesn't seem to work with the worms reinfocements installation: when I want to install reinforcements it says "insert original worms cd", no matter if I insert the Worms "Sold Out" cd.

Do you have any option for me? I want to make a Worms revival evening with friends!
Thank you very much.

A Worms fan.

SoldOut releases are packed differently so I'm not sure you can get it working, you might try looking for the Worms United SoldOut release instead, which includes both games packed into one.