FAQ:
Q: What does Alci's IMG Editor do?
A: In the simplest way it allows you to import mods, the most popular uses are to change character skins and car skins aswell as the GTA SA Map (along with other things.)
Q:Where can I download Alci's IMG Editor?
A: You can download it here
STEP ONE:
Open up Alci's IMG Editor (pretty explanatory)
STEP TWO:
Click on "Files", A dropbox will drop and press "Open"
STEP THREE:
Find a file called "gta3" and press "open". The gta file is located in the models folder of your GTA SA.
For Steam users it is usually in Steam->steamapps->common->Grand Theft Auto San Andreas->models
STEP FOUR:
Click the Import button (The highlighted icon in the next image) or click the "Actions" button and press "Import (remove if exists)"
From there you can select the files you want to import, once selected press the "Open" Button. As an example I've chosen these .ipf files to import.
STEP FIVE:
Click the Rebuild button (The highlighted icon in the next image) or click the "Actions" button a press "Rebuild"