dennilfloss, With Win98FE, the 4 in 1's are required. It has been awhile since I have configured 98FE systems, but when I did, the 4 in 1's were installed, followed by the VIA PCI Bridge Patch.
ctk9090, I have not used an MSI Turbo at this time. I was one of the unlucky people that received one of the Pro2A's that had some issues, including the problem with setting/retaining multiplier adjustments, so I have been "waiting in the wing" to see if the same issue would occur on the Turbo. It seems that is has in some cases. To be fair, I did receive another Pro2A from a customer as a trade in recently, and it worked fine, including the multiplier adjustments. To answer your question though, I have configured the ABIT KT7A, KT7AR, and ASUS A7V133 with only the AGP driver with fine results. I would setup the MSI Turbo the same way if I had a request to do a customer build with that mainboard if using 98SE or 2000.
In the next few weeks, I plan on receiving a quantity of IWill KK266's, and other KT133A boards to test. I will post my results if forum members are interested. When I test systems, I test them loaded with business software, utilities, benchmarks, games, antivirus programs, and firewalls installed. This gives me clear "real world" results, instead of just throwing on an OS, and a couple of benchmarks and games.