This is a small tool that lets you easily modify arterial bleedout chances and other flags in any peddamageinfo.meta file.
You can drag a selection box around cells, then use Edit Multiple Selected Zones to quickly change percentages or flags.
I don't recommend changing flags unless you know what you're doing though.

If you modify my peddamageinfo.meta file, you'll notice certain zones have their chance values locked (any zone with the PDOR_Conditional_Headshot_Bleedout bleedout type).
This is because Enhanced Headshots overrides these values.