I just discovered another useful program, good for managing massive files.. the type that the hard drive space challenged are quite aware of...you can use it as an automated resizer, i just got done resizing 250 files that were in the 4 to 5 mb range apiece and it shrank them a user determined percentage automatically and reduced them to around .5 mb after i input 44%. it is best to redirect the resized files into a seperate folder to avoid overwriting until satisfied with the results
it is called faststone photo resizer... i think it is freeware with a purchase option, i installed it on my Vista OS without problems...link below
http://faststone.org/FSResizerDetail.htm