Hi,
I think we missed answering your post.
One option you can try is to have a DOS menu. In 98 DOS if you look at the Config.sys documentation, it is possible to define a menu.
format is something like,
[Menu]
menuitem = NetDriver1, Use Intel Pro driver
menuitem = NetDriver2, Use 3Com 90x driver
and then you can define what needed to be done for each selection. When boot with this, it will show you the menu and can select the driver you want.
Let us know if you can't find documentation, I will try to find them.
Krish