How to show Images in a Cell based on a condition?

Dear Forum,

I am aware of the option of displaying an Image/Picture via comment but I need to show a picture based on a condition..

I tried manually selecting the picture from the path mentioned below :

"C:\Documents and Settings\Administrator\My Documents\My Pictures"

I have 2-3 images that I want to display based on a condtion when the time turns 16:00 hrs then the First Image Should be displayed, when it turns 16:30 hrs then the second and 17:00 the last image.

I tried researching the forum, however none of the threads provided an option to to add my Images..which can be later viewed...

So how do I do this?