Maybe this helps:
http://www.japheth.de/Download/svgaptch.zip - VESA 2.0 dirty hack for Win3.x svga256.drv
http://home.arcor.de/g.s/vbehz.htm - adjust refresh rates under DOS

aleksej wrote:

VESA 2.0 dirty hack for Win3.x svga256.drv

that often has freezing issues though

Works well stable for me. Didn't notice any issues.

Amigaz wrote:

I have installed scitech display doctor version 6.53 I think in win3.11 which also set up the DOS utilities and it launches the univbe thing in autoexec.bat and make my old CL5428 based gfx VESA 3.0 compatible and updates some more stuff but it eats alot of conv. memory even when loading it HIGH

Maybe there is not enough space left in upper memory for the UNIVBE driver to be loaded high. You can check with the command "mem /c /p".

5u3 wrote:

Amigaz wrote:

I have installed scitech display doctor version 6.53 I think in win3.11 which also set up the DOS utilities and it launches the univbe thing in autoexec.bat and make my old CL5428 based gfx VESA 3.0 compatible and updates some more stuff but it eats alot of conv. memory even when loading it HIGH

Maybe there is not enough space left in upper memory for the UNIVBE driver to be loaded high. You can check with the command "mem /c /p".

I'm going to check that, thx

But how do I set it univbe up properly....there's a bunch of exe's created in the SDD folder

Amigaz wrote:

But how do I set it univbe up properly....there's a bunch of exe's created in the SDD folder

Well, basically there is not much to do except loading UNIVBE.EXE in AUTOEXEC.BAT.
If you installed the whole package from Win3.x, there are some help files explaining the purpose and use of the other programs. You can access them from the SDD control center.