All you do is download the 29 volumes the exact same way you would copy and paste a file from one folder to another on your computer. FTP client is built into XP so just go to
ftp://whatever.com and there will just be normal folders and files. (This is an example ftp but go ahead and try it, who knows)
Now, the files are RAR format so you will need winRAR to extract after you have downloaded. There are 28 volumes labeled .r00 through .r27 and a main file labeled .rar. After all is downloaded, extract the one labeled .rar, and an .iso file will be created. This file is an image file for a cd, and most burner programs will write this to disk.
After that, its as easy as intalling the game itself. Just stick the disk back in and let it autorun. A list of intructions in the manual will help with this part (found under downloads at
https://wwwcfs.cnet.navy.mil/microsimptt/ )
Anything better than dial up will be ok. BUT only one person can download at a time since this is from my house. I am hoping that once a few people get it on their computers, they will also be willing to share. This will help spread the files a bit faster. If anyone is interested, let me know and I will help you set up a VERY simple FTP server. Hope this helps!
GOOD FLYING!