You have to put it in your first CD-ROM drive, otherwise it won't work. Also, make sure paths are correctly set in the Tomb Raider configuration files.

the cd is in the cd rom and it still dont work for some reason im not sure how to set the path in the tomb raider config

The first CD-ROM?

ya the 1st one d: i tryed it in E: too like i said before this cd is a diffrent one from the orginal it has abunch of demos and the tomb raider files are in a folder called tomb

and i think thats why it dont want to find the cd cus the orignal just had the files in d:/ i think

*stare*

Did you try changing the path in the GliDOS.ini file to the proper location on the CD?

Joe. Take this advice. Type using full sentences and avoid using pronouns for everything.

The Glidos.ini file inside your GLIDOS directory contains the location of your game's TOMB.EXE file so that GliDOS knows where the game is... If it is installed anywhere other than the default location (which is C:\Tombraid\Tomb.exe), then you must edit the Glidos.ini file to match the location of your TOMB.EXE file.

So, for example, if it's inside a directory called "TR" on your E: drive, then you must change

C:\Tombraid\Tomb.exe

to

E:\TR\Tomb.exe