You can use a photo-stacking program to combine multiple photos of the same scene to generate what looks like a long exposure. To try out this technique, install a program called Image Stacker. There's a free trial available, but it is limited to photos that are 640 by 480 pixels or smaller (the full version costs $17). That means if you want to fiddle around with Image Stacker, you'll need to resize your photos in a photo editing program first.
To use Image Stacker, just drag several photos into the program window, specify the output file, and click Create. You can experiment with various blending options, but I've had good results with the default Stack setting--as you can see in this photo.