Over time, after trying many variations of our web pages, we end up with a large collection of unused images and "bv01234.gif" files.
This will help in identifying unused files. Then you can delete them from your local PC, and your public_html folder.
First, a bit of background stuff.
When you first insert an image into a BV page, lets say you insert the image from ...JunkFolder\Image01.
It doesn't matter that you inserted the image from JunkFolder, BV will make a copy of the image in its bluevoda\images folder when you publish the page.
So the bluevoda\images folder contains your current published images, AND past published images.
BV also makes a copy of the previewed images in ...
Documents and Settings\yourusername\Local Settings\Temp\preview
So to clean up the unused images try this.
Go to this Temp\Preview folder in explorer and add the column "Date accessed" to the explorer window.
(Right click the headings, choose 'more', and tick "Date Accessed")
Now go to each of you pages in turn, and preview them all.
If you then go back to the temp/preview explorer window, you can see which ones have been accessed by your last preview.
(Sort them by "Date Accessed" by clicking the date accessed heading)
The ones that have just been accessed are the current, in use images.
You can delete the rest from the Preview folder, and the Images folder on your local PC.
Then delete them from your public_html folder on your server.
The best way to delete a bunch at a time from the public_html folder, is to open FTP Manager. Then select all the unused files by CRTL+click, which will highlight them, then delete.