Do you use LILI, UUI or tazusb.exe because it won't fit 128MB USB or it just won't boot.
Download rolling iso from https://www.slitaz.org/en/get/
Boot it up using VMware, it might not enter X because you need to login as root/root, type tazx, configure to use vmware display driver.
normal user is tux
format your USB using
tazusb format /dev/sda1
create image from current running live ISO
tazusb gen-liveusb /dev/sda1
Now you can try to boot that USB using VMware, if VMware cannot boot it, in vmx file, change or add the following lines.
firmware = "efi"
efi.legacyBoot.enabled = "true"