Not sure if it can be done too easily. All the renders in the new cut gallery are stored in a database. All the renders in your old one are just static text. However, they are part of posts which are in a database, so a solution is possible. I can look into it this weekend if you want.
Sorry about the error... I renamed the folder storing the renders from 'psds' to 'renders' and forgot to update that on the gallery page. Should be working now.
Just post if you find any more bugs.
