Step one: 
Run NLSetup11.exe to install NoLimits RollerCoaster Simulation v1.1 full

Step two:
Run NoLimits program and enter registration info with keygen.
Make sure you use an email address as your registered name. 
If you don't want to use keygen, try these:

User-Name: DragonQuest@forum.sharereactor.com
Reg-Key: 31534-1090822380-65459

or

User-Name: YouAre@Registered.com
Reg-Key: 31534-3685908445-65472

or

User-Name: CORE@RoXoRs.com
Reg-Key: 31534-4237025501-65478

Step three:
Run NLUpd125.exe to install NoLimits RollerCoaster Simulation v1.25 Update

Step four:
Run NLUpd1261.exe to install NoLimits RollerCoaster Simulation v1.261 Update

Step five:
Run NLUpd13.exe to install NoLimits RollerCoaster Simulation v1.3 Update

Step 5:
Look in "sites" folder to find related sites for NoLimits.
Enjoy full release of NoLimits RollerCoaster Simulation v1.3 ^_^

This is another compilation by DragonQuest.