You can create the slideshow and upload to your website's subfolder, such as "slide1", "slide2" etc. then in your HTML which will contain these slideshows, you need to add the subfolder name to the path of the SWF file and the "XML_path" flash parameter.

For example:

We have created two slideshow in the folder "slide1" and "slide2" as shown below:



And the following image shows the  code we used in the HTML file:



The key point in this sample is the file folder before the SWF and XML file.

<param name="movie" value="slide1/slide1.swf?xml_path=slide1/slides1.xml" />
and
<param name="movie" value="slide2/slide2.swf?xml_path=slide2/slides2.xml" />

You may download the sample zip file from the link below to get more information.

http://www.flash-slideshow-maker.com/docs/two_slides.zip

This sample could be visited at:

Two slideshow in one page sample