Some assistance is needed.....

[Oldsmobile_Mike]

HighGfx is picky about what monitor you use it with. It's really pushing the system to it's limits. Try some of the other modes, like 800x600x16-color SuperPlus, I've found that worked on every monitor and TV I threw at it. At it's most basic, the Indi ECS is just a scan doubler. Do other modes display correctly at 31KHz?  NTSC 640x400, 320x200, etc.?

Also make sure your firmware is on 1.10 (not 1.01) for the more advanced screenmodes. You may need to tinker with the config tool, but the "out of the box" config should work fine with most normal Amiga screenmodes and modern displays.

[Oldsmobile_Mike]

Wasn't sure if you're still having problems with HighGFX, but in the archive on Aminet there's a file called "OLD_HGFX.GUIDE", and in that guide it says it requires OS 3.x and WB 3.x.  So you might be out of luck if you're trying to use it under 2.x.

FYI, as I mentioned before, I've used it before and it's *very* picky about monitors.  The guide file mentions (quote) "The frequencys are 54 Hz 22 kHz".  Also under ECS it's limited to 4 colors.  My recommendation if you want to use a high resolution mode is to stick to 800x600, which under ECS supports up to 16 colors.  There's several good guides out there on this, including mfilos's:

http://www.mfilos.com/2012/01/a600-trying-800x600-resolution-setting.html

[Oldsmobile_Mike]

The old SFS 1.58 should work with KS2.0, and when it comes to PFS, I will suggest that you try PFS3-AIO.

Wow, PFS3-AIO works with Kickstarts all the way back to 1.x, at least according to the .readme.  Who'd of thought?  

http://aminet.net/package/disk/misc/pfs3aio