hey ezysk,

it's pretty easy, you can use PS or ImageReady, both already have "resize actions". adjust one of those or make a new copy to fit your specs and then select FILE --> AUTOMATE --> BATCH

Select the resize "Action" you need and change whatever settings meet your needs.

basically you make the action to do the "legwork" and run the "batch" function on your action to do all the "legwork" for a whole directory...

hope this helps,

:)
retrocity