Using RENAME to rearrange filename

I have quite a number of files with the name e.g., "PS1234 description" where the length of the first word is always the same but is a variable number.

Is it possible to use RENAME to rearrange the names so they would end up as, e.g., "description PS1234"? I've tried using the DOS wildcard character "?", but that doesn't seem to be allowed.

Old name: (PS[0-9]+) (.).(.)
New name: \2 \1.\3
Type: Regular Expression

Thank Jon. That's is perfect. It works like a charm.

Is this type of syntaxing availble anywhere in a manual or tutorial?

Both. Rename Scripting area here and the appendix to the manual.