RENAME partial filename - possible?

[seasea]

Hello, Is it possible to rename partial matching on characters (__) and rename everything after.

Filename consists of Part A__Part B
Part A is different for every file
The Joiner __ is the same for all files
Part B can be set in the rule e.g. "refLOC3 12345 B"

Example:
Filename = Experience Is Wonderful__ref12345 A 45
match on __
rename every after __ to "refLOC3 12345 B"
Result = Experience Is Wonderful__refLOC3 12345 B

[Mr_Noodle]

Look up match patterns in the manual. You can use custom attributes to grab the parts you want to re-use.