Multi-rename tool; move characters within file name?

[Beun]

With the multi-rename tool, is there an easy way to move the last four characters of a file name to the front of the file name?

Example:
filename1234.ext should become 1234filename.ext

I have an entire directory filled with files that should get this treatment.

Thx

[sqa_wizard]

Search: (.*)(....)
Replace: $2$1

[ ] E
[x] RegEx

[Beun]

That. Is. Brilliant.
Thanks.

[MVV]

Or w/o regex: just use name template [N-4-][N1--5].

[Beun]

Thx