[Fanboy06]

Short version:
I need a function that allows me auto rename files (in my case image files). For example: 0001, 0002, 0003 or [Name] 0001, [Name] 0002, [Name] 0003.

Long version:
I very often download loads of Images. I download these images on special websites for hosting images. Most of the time i deep analyse and download hundreds of links, which results in thousands of image. But a large portion of these images have a very long name, which gives me invalid download directory error. + It too inconvenient the name of every image.

[Jiaz]

You can use packagizer and use the tag <jd:indexof>. It will be replaced by index of link within its package. I suggest to create a rule that auto renames the files when you add them.
Please provide example links if you need further help with it