You will probably have to use a Script for that. (Edited)
Yes, but where can I get one? This sounds like a pretty common problem, so perhaps it's available somewhere.
Russell Browns web site has one name Image Processor Pro you can have it save many image files for each file you have it process. For each you can set what format to save in, optionaly have it resize the original to fit within some pixel boundry the document original aspect ratio will be preserved. Optionally you can also have the Image Processor Pro run an action you select before the Image processor Pro save the output files for some or all output file set ups. The Actions can be run before or after the optional resize is done. These actions could also resize, crop or distort the active work document.
Note the Image Processor Pro script is coded as a Photoshop Plug-in it can be recorded in a action. Because its a Plug-in you will not see it in menu File>Scripts>Script Name. Once installed you will see it in menu File>Automate>Image Processor Pro...