Download the free software here:
www.irfanview.com
Open your photo in this software. then click on Image on the top bar and
click on Resize.
Before trying with your original file, make a copy of it (right click on the
file name, click on copy, hold the Ctrl key down and press the letter V; a
new file will be added in your folder with the words "Copy of" in front of
the original file name) so you can see how good the enlargement will be.
If you are worried about printing these low resolution images, I would take
them where they have a Noritsu or Frontier printer (Costco, Wal-Mart,
Walgreen, Ritz, etc) they can get you a decent print out of fairly low
resolution image with their software.
A way to reduce file size for e-mail is to use the software below. It adds a
reduced file without removing your original file.
Image Resizing
A. To decrease the size of the file for e-mail, web publishing etc.
Go to this site and download the free Image Resizer. Exe file in one of your
folder.
http://www.microsoft.com/windowsxp/pro/downloads/powertoys.asp
Once in your folder, double click on it to install it.
Once installed, you right click on a photo file (or on a group of selected
photo files).
Click on Resize image on the opening menu.
A window will open, select the size you want.
New files will be added in your folder, same name as original file but with
the word (small) added.
The first time you use it, you may not see Resize image on the opening menu
after you right click on the file or if you see it, it may not work. If so,
do the following:
Click on Run, click on Start and type the following in the textbox:
REGSVR32 SHIMGVW.DLL
and press the Enter key.
Note that there is a space between ...32 and SHI.
Also, you can download a free batch converter from here to resize pictures
and edit photos:
http://irfanview.com/