Images for some products and not for others

version 1.3.8
Is there a way to install some images for some of the products but have another category of product which have no images at all?

Not quite sure what you mean here...

Do you want a specific product to have an image in one category, but not in another?

... or do you want some products to have images and different products NOT to have images?

If the latter... then just don't upload any images with the product data...

If the former - not sure if this can be achieved with php, but you may be able to create a CATEGORY SPECIFIC STYLESHEET* that contains the declaration:-

.listingProductImage, #productMainImage {
 display: none;
 }

*Category-specific stylesheet "how-to" is explained in the README file in a default css folder...

(Possibly a good idea to have this category-specific stylesheet anyway - as it will prevent the blank links appearing too.)

Thanks. I mean that I want some products to have images and others not, but I don't want the large gif which shows 'no image available' to pop up. For example, say I have two categories - pens and envelopes. I want the shop to show the images I've uploaded for the pens but I don't want any images for the envelopes. Hope this is clearer.

You could also consider creating a transparent gif (transparent.gif) and loading this into your images folder.

Then for every product where you do not want an image, state its image as: "transparent.gif".

To be sure that you don't get any text linkings that can appear, (such as to "larger image"), you must also then create the category-specific stylesheet and apply the declaration I suggest above.