Why is this useful? Well you will find that some of the bikes models come with a multitude of skins included.
You can simply whip out your Hex editor, and a few seconds later, you can extract whatever you want. You will see when you open them up in Notepad, nothing has been encoded or compressed. Funny thing is, these are ridiculously easy to open up. These 'SAF' files are suposed to be a way of packaging the files up to keep things tidy, and stop people getting the contents from inside. If you get the rider model by P2STA, you should be good for most skins. To find out if this is the case, you can open up the SAF in Notepadd++, and there will be a list of the name of the files that are included in the SAF. You may also find that when you download a set of skins, the models you need may already be included in the *.SAF file. MX Sim Pits also has the odd model that might not be available elsewhere, and as Al mentioned. Models (most of this stuff is actually pretty up to date) Like Al said, Download all the updates you require and then once you're fully updated, get the 'snapshot'.