Simple, repetetive job for someone

I need someone to simply log into the admin area of one of my sites, then use a script thats on the site to aut-generate thumbnails. I have tried to simply leave the script running but it times out, so you have to select 10 - 20 images at a time, let it run through then select the next lot etc. Very very simple, but boring. Couldnt even tell you how many images are left to process as I am still generating the images. This is using Joomla and the autothumbnail component, if you are familiar with using that please bid. Thanks