Hi I have a 3.2 HD with 2 partitions: A NTFS one with NT4 (C:) in it and an empty FAT16 one (D:). I want to install windows 95 in the fat 16 one without losing the files i have in C:, but don't find the way....can someone please help me?

I don't think you can do it. It is my understanding that you have to have 95 installed first. This means that you have to have a small, non NTFS bootable partition with thhe NT *boot files* on it. You can install the system files from 95/NT to another drive but the primary partition must be non-NTFS. The Microsoft knowledge base has pretty good documentation on this.

You can install 95 on an NT system. First you have to install dos. Then you have to boot the system with the NT setup disks and repair the boot sector of the system only. After that you can boot into dos and install 95 from there. After that you will need to modify your boot.ini slightly to be able to boot directly into 95 from the os loader. However to do all of this stuff you need the c partion to be fat. Since you have it formatted with NTFS I think you might be SOL.

Get your self a copy of Particion Magic. It contains a bootmanager that you can setup to make coose between NT and Win95. It makes it posible to have NT instaled on a NTFS partition.