Depending on how you got your setup, you can use my content distribution script: C.A.T.S.
Fully documented, aged, and battle-tested (my site served out almost 4 MILLION pages last month alone thru this script).
I use it to do my moblog (mobile camera phone blog) among other things. Just FTP the files and the script does the rest (no need to do any 'importing' into your site).
Take a peek here.
I even wrote a automated thumbnail generator and upload batch script that I WinAT scheduled to run once a day (fully documented and linked):
Automating a moblog / photoblog
If no new files are present...nothing is done. The script also supports the option of doing 'albums' (a little bit more complicated but totally do-able). Suppoort for thumbnail captioning is also in there.
Lots of parameters to customize the final result, completely template based so it can use your site ident. I've the SQL call set up to display newest first (as you will see)
Note: thumbnails in GIF, full-size images in JPEG.