Saving tiff or jpg files within a single, existing psd file without creating new files

Question

     Hi, I just bought CS5 and I wonder if it is possible to save multiple images that are created within a single psd file in jpg or other image file formats without creating new psd files, but rather saving them as "embedded" within the single psd file in whih they are created. For example, one could select a portion of an image that one has created, and save just that selection as a jpg without leaving the existing psd file, and after that, one could select another portion of the same image and save it as a tiff, etc. Is this possible?
Much thanks.

Answer 1

No and Yes!
You can do much of what you want, but not exactly as you described it.  You can certainly make multiple selections and have them saved in the psd file. You can also save jpg version of those selections, but you have to do a little extra work.
Lets say, by way of example, you have an image and you want to make three different selections within that image, save each selection as a jpeg, and save those selections along with the full image as a psd file. You can do the following, which is just one way of several to proceed, with your image opened.
1. Make selection 1, hit Ctrl+J to jump that selection to a new layer
2. Make selection 2, hit Ctrl+J to jump that selection to a new layer
3. Make selection 3, hit Ctrl+J to jump that selection to a new layer
4. Alt click on the layer with selection 1. This makes only that layer visible.
5. Click on Layer > Duplicate Layer > destination New > give it a name
6. This creates a new (temporary document). Open it.
     click Image > Trim > transparent pixels
     click Save for Web & Devces, select your parameters and save your jpeg
     Close and discard this temporary file.
7. Repeat steps 4,5 & 6 for selection 2 & selection 3
8. Save your psd file
You now have three jpegs and a psd file with all the information to create or modify the original selections
Paulo