htaccess guru wanted

[Pieter]

Hi

 

looking for the rewrite rule for

 

/123-456-large/imagenaam.jpg

to 

/456-large_default/imagenaam.jpg

 

how to get th 123 off but keep the 456 and add the _default to the directory name

 

 

reason:after upgrade i want some external image links to keep working

 

Thanks!