Hi. Welcome. I think you mean SFC: GE for Gold Edition. (There's actually a SFC: CE for Community Edition, a 2012 recoding of SFC: EAW.)
Anyway, the basics of installing SFC: EAW, OP, and CE are all the same.
1. Right click any installation file (.iso, .zip) you download from here (Dynaverse.net Marketplace) or elsewhere. Select "Properties". Make sure the file isn't blocked. If so, unblock it and apply your choice.
2. Mount an .iso with MagicIso (free version). Other virtual CD-ROM drives (Daemon Tools, CloneDrive, Alcohol, etc.) sometimes cannot read it, but MagicIso always works (it may seem to hang...but be patient). If the file is zipped (.zip, .rar archives), extract it first, then mount it.
3. Install to a directory such as "C:\Users\RocketMedic\Games" or "C:\Games". (Your hard drive's letter might something else, such as D:) Trying to install to "Program Files" or "Program Files (x86)" doesn't work! Windows 8 and 10, however, don't freak out about applications installed to "Users".
4. If you have no problems installing EAW/OP/CE, open your sfc.ini file, which is found in the same folder as Starfleet2.exe/StarfleetOP.exe/Starfleet2CE.exe. Look for, and save, these settings at first...
[3D]
wireframe=0
windowed=0
driver=0
lowres=0
[mouse]
hwblit=0
5. Launch the game. If it is playable, you can later try higher resolutions by changing the value for "lowres" in the [3D] section of sfc.ini...
0 = 800x600
1 = 640,480
2 = 960,720
3 = 1024,768
4 = 1152,864
5 = 1280,1024
6 = 1600,1200