One of things that people have done with the Vx0 is to use it as a Retro Gaming Machine under Windows 98SE. Here you will find three people's approach to setting up such an environment.
In May 2018 I heard from Brandon who had recently picked up a VX0L (dual monitor version + dual SD-reader/PCMCIA slot) and, after much trial and error, had been able to convert it into a Windows 98SE gaming machine. You can read about it here.
In November 2019 I heard from Xander who had also gone down the 'Wyse V90 and Windows 98 as a light gaming machine' route. He had recently bought a cheap Wyse V90LEW which was fitted with 2GB of Flash and 1GB RAM. As he didn't possess an external floppy drive or external CD drive he managed to install Windows 98 (and Windows XP) on it just using a USB flash drive. You can read about it here.
This was something that I had been considering doing for some time so I decided to follow Xander's guide and insert comments in it as necessary to reflect my particular circumstances, but ended up leaving his description 'as is' and producing my own version. You'll find that here.
Note: The Vx0 uses a VIA chipset and the drivers are still available from VIA's website. The PCI listings on the relevant hardware tab will identify the chipset driver you need.
Over to Xanderr:
The USB flash drive I used was a cheap Swing 32 GB UNIREX 3.0. I set the first boot device to be USB-ZIP, and used RMPrepUSB v2.1.743 to prepare the bootable USB drive. Your USB flash drive needs to be at least 1GB in size to accommodate the Windows 98 installation files.
Steps:
Note: The computer hung when I was trying to use xcopy to copy the Win98 folder to C drive. After that hang it would not boot from the USB flash drive however many times I rebooted the computer. However it did start behaving again after I fully powered the system down by unplugging the power supply. It looks like that unplugging the power supply to wipe the slate completely clean is advisable if you are having booting issues.
I found my xcopy issue was fixed by loading SMARTDRV. As well as solving the 'hanging' problem it speeds up the copying process. (You need to edit CONFIG.SYS to load HIGHMEM before running SMARTDRV)
All Windows 98 drivers for the Wyse V90 can be found on VIA driver downloading website, including chipset, graphics, audio, USB, LAN.
Windows 98SE is poor in its handling of USB flash drives. However there is a generic USB mass storage driver called nusb36e.exe that solves this problem. I found that once I installed it I had no problems with my USB flash drives (including a USB 3.0 64 GB flash drive). This is makes transferring files between the thin client and other computers much easier.
Another issue of Windows 98 on the V90 is that of the S3 Unichrome Pro video modes. In Windows 98, they can only be set at 640x480, 800x600, 1024x768, 1280x800, 1280x960, 1600x1200. In Windows XP, other modes can be set like 1280x720 and 1920x1080.
I subsequently found that the Wyse V90LEW also supports 1280x768 mode in Windows 98. I also think it is best to use the VGA output as I've found the DVI output to be occasionally problematic when gaming in Windows 98.
I used exactly the same approach to install Windows XP. The only difference is that I copied files from a Windows XP iso file and I ran WINNT to install it. I didn't need to copy all files from USB flash drive to the SSD drive as Windows XP installation process will copy all the files automatically. Also USB flash drives are fully supported in XP so there was no need to copy over an image of the installation media. Once again all the XP drivers can be found on VIA website.