Problems with RCT3

[Grumpy]

@John89
If you dont have the original disc in your possesion then you are not entitled to any help!
Read the Forum Rules particularly #3 which states as follows:

3. Do not request original game files or registry entries! You must have a legal copy of the game to ask questions about it on this forum. We do not care if you don't have it, for reasons including but not limited to:
the original CD/DVD being damaged or broken for any reason (kids, pets, damaged CD/DVD drive etc.);
the original CD/DVD being rented from a shop, borrowed from someone, lent to someone, or left at another place;
having no compatible or working CD/DVD drive or having no CD/DVD drive at all.
If you do have the original CD/DVD, reinstall the game, to get the files or registry entries back. If the CD/DVD is damaged, contact the publisher and they will send you a replacement, usually for a small fee.

Tell your friend to purchase his own copy of the game as you need yours!
Also in most countries it is illegal to install the same game onto 2 different machines at the same time. Read the game EULA for more information about this.