Reordering filename and adding a leading zero if not present

[bitzie]

Hi,

I have a ton of files that I need to reorder the names of as well as adding a leading zero if it's not there. Unfortunately, the filenames are not consistent as far as the number of characters per "section." For example, two files look like this:

1. Ballet Rehearsal-Edgar Degas.tif
33. Shot Marilyns-Andy Warhol.tif

What I would need them to be out put as is:

01_Degas_Edgar-Ballet_Rehearsal.tif
33_Warhol_Andy-Shot_Marilyns.tif

Thanks!

[Luuk]

With RegEx(1) with having a checkmark for "v2", the "Match" and "Replace" can be like...
^(\d)\. (?X)^(\d\d)\.\x20
0$1_(?X)$1_