There are at least two versions of the game, one with WINTER2.BIN file and one without it. On both versions the executable is packed, UNLZEXE unpacks it, partially, however.
In-game, you can install the game permanently to the hard drive with a Fast Load option; doing so will result in an executable twice the original size with most assets stored in their decompressed form.
At the beginning of file, read the following:
|INT32LE||offset||Offset to file|
|INT32LE||length||Length of file|
|CHAR||name|| Name of file, zero-terminated, decipher each char by subtracting |
Note : most of the files are compressed with what appears to be a form of RLE compression.