Since the SimPE website closed, it’s now impossible to generate new GUID’s for your Sims 2 creations from inside the software. Here’s how to do it very simply.
How to install custom Sims into your Sims 2 game.
How to install the Sims 2 and all packs on Windows 10
If you struggle with mapping, this tutorial by Numenor at MTS may be the thing to read.
Creating recolourable subsets for your Sims 2 meshes
Easy Tutorial for Connecting a Garage To A House on a Foundation