limewire pro disk is unreadible by Mac OS9.2

limewire pro disk is unreadible by my iMac OS 9.2 and also in my sister's G3 OS 9.2.1

It's like the disk was meant only to be read by a PC and not a Mac.

any ideas on what I should do?

I didn't use the disk, but did you read the install directions?

Do you have to hold down the "c" key when booting from the disc?

Did you receive any errors? If so, what did they state?

Try installing w/extensions off.

Make sure your CD tray/slot is clean. You may need a CD cleaner which can be purchased from any store that sells CDs.
Also, make sure the disc itself is not defective, scratched, cracked and/or dirty.

If the disk is not v4.0.5, suggest that you go to limewire.com & download the free pro update.