-How to install os 3.9 using Winaue?
There are some tutorials on the net. I bet you will find them easy if you google a bit.
-Will everything become faster with a Budda Flash Gold MKII?
No
-Can i Boot from CD if i get the Budda?
No
-How to i connect another simm socket to my Apollo?
Solder it on the other side.
-Can i use a a2091 scsi card in my setup?
Yes
-Can i dual boot with linux and os 3.9?
Yes
-Can i only use a Budda or do the main disk have to be connected to the ide port on the Mainboard?
No
-Can i connect a differt fan and a heatsink to the cpu on the Apollo, if yes how?
Yes