What are some alternatives?
When comparing xorriso and WinISO, you can also consider the following products
MagicISO - MagicISO is a powerful CD/DVD image file creating/editing/extracting tool.
PowerISO - PowerISO is a virtual drive that allows users to encode, burn, mount, and even encrypt CDs, DVDs, and BDs. The software can be downloaded from many platforms and sites online.
WinCDEmu - WinCDEmu is an open-source CD/DVD/BD emulator.
ImgBurn - What in the Heck is IMG Burn? We all need to copy discs from time to time.
UltraISO - CD image files are easily created with UltraISO.
Iso Master - [You need a C compiler to install it from source.]