Hi SueGThere's a few things you can do depending on how tricky you want to get
1. A simple thing that in my experience helps a lot on Word files is to open each graphic in your paint program (it needs to read GIFs or JPEGs or whatever format your graphics are in). Then save, and optionally resize them before saving.
I have found that Word is not very clever about maximizing the compression on graphics, so this does help
Also I have found if you have photographs, they may actually be much bigger in size (I mean dimensions) than needed in the final ebook, which inflates the size of the graphics. So resizing can help too.
2. This is a little harder, but works good.
If you're not sure of what you're doing, do this on a COPY of your work rather than the originals.
Open each HTML file in a text editor (Notepad, DOS edit etc.)
Search for SRC= and BACKGROUND=
These are HTML codes for links to graphics
If you have the same graphic appear under different names in different files (use the Paint program to see what each graphic is before you start and maybe make some notes)
Then you can change all the HTML files to contain the name of the same graphic file, and remove the extra copies of that file.
3. This is truly sneaky, but is hardest of all
You might want to try step 2 first, and as before work on a copy of your work.
Use Notepad to find the block of HTML code that corresponds to the menu which occurs on each page
Cut out that block into a separate file, outside your source file, and save just that block, save into mymenu.htm
Now go back into each HTML source file and whereever that block of code occurs, put [={MyMenu}] (case sensitive)
Now go into Activ E-Book Compiler and Add a variable called MyMenu and make it include an HTML fragment, the fragment being the menu.htm file
Finally use the menu option on Edit to turn the PreProcessor on for all files.
When doing this the best thing to do is to do it slowly, step-by-step
After each step, save a copy of all your files, so if the next step goes wrong, you can go back to the previous step without having to start over