Id like for it to show small images in the field and this field is also displayed in the postbit. is there a way to make them show up, the html i mean?
If you want to add any image in User Details area, then here is how;
In "postbit_author_user" template, add the following code where ever you want it to show that image;
Field Name: <img src="{$post[fidX]}" alt="Field Name" title="Field Name">
Replace X with your Custom Field ID.
Now users just have to add the "URL" of image to show on their postbit.
But if a member doesnt have an image to be added, wont it show up as like a little red x in their postbit?
You could use
PHP in Templates to check if the custom field is empty or not:
<if $post[fidX] != '' then><img src="{$post[fidX]}" alt="Image" /></if>