Well, I'm running at 150 now but I'm not getting my hopes up!
The first try was with 3-6-4 memory timing but the SMART for the HDD was disabled. Now I am using the same timings and ENABLED the SMART so we'll see what happens. It seems that my external modem is slower, although I don't know why it would be.
As for using the HDD to flash! Here is 2 ways but I am sure there are others. I put the flash .exe and the .rom files in a directory called C:\ECS_FLSH
I keep the name to less than 8 characters so it can be found easily and DOS displays it OK.
You can then boot with a basic floppy with just the system on it and get to the command prompt or, you can set 'MSCONFIG' to restart in the DIAGNOSTIC mode and you will get a menu that allows a choice of starting with the command prompt. Then just go to the C:\ECS_FLSH directory and flash the bios.
NOTE: this is for using Win98! I cannot say for sure about other OSs.