FDXMS

I was trying to free up conventional memory by using the devicehigh 
commands for the various device drivers in config.sys.  But they don't 
load there, and on boot up the system reports" UMB not available".  The 
system continues to boot, and the drivers end up in conventional memory. 
 I have read the bug reports and the sample config.sys file.   Also, I 
have just upgraded to the Beta8H1 version that was available as an iso 
image.  So probably I am using the latest versions of these programs 
available.  

I understand that emm386 is incompatible with FDXMS.  So  is it just 
part and parcel with the use of FDXMS that one cannot access Upper 
Memory?  Is there a way you could load into the extended memory 
perhaps(or perhaps that would be too "unDOSish")?

Thanks,
George