The extra folder I was talking about is on DISK 1 of the FS9 instalition disks. When you put the disk in it will display a menu asking you what you want to do just close the window
and then explore the disk using the my computer short cut right click on the drive that has the disk in it and click on explore then you will see the extras folder Gmax is in that folder.
I had a littlle problem with the house at first but after reading the instructions again I finally managed to figure it out. Of course I got the textures in the wrong place I had the front door on the roof and the roof was at the front but I finally got it right. What I did was to print the instructions that way I was not switching back and forth .
I hope you have a full head of hair it sounds like you are going to be needing it

Just hang in there and take it one step at a time; if you try to rush through it you will not get it right. I did the same thing was a little inpatient and tried to finsh it before I had started it and had all kind of problems .
But if you print out the instructions and follow them to the letter you will get there just save as you go so if you make a mistake you only have to go back one step