Don M.
The photos you upload will sit on the Lugerforum server for an extended period of time... but will eventually be deleted.
Once you have the URL for a photo you have uploaded, you can reference the photo in any message. You can determine the URL for any photo you see on this website by right clicking on the photo and choosing the "properties" and the URL will be in the pop-up box.
Once you have uploaded a photo, the only access you will have to it will be to reference it in the manner you have already described. There is no way for you to delete it.
Creation of 'thumnails' is a tricky procedure, but I will try to describe it as best as I can.
Create your message post and include the photos that you wish... if they look too large, then use the EDIT icon (paper and pencil) to edit your post and change the 'image tags to read "[thumb] [/thumb]"
...You can do this only ONCE... if you attempt to edit the post a second time the photo display attributes will be scrambled and it will not be pretty...
You can try this a couple of times if you like, and when you are done experimenting, just use the edit icon to edit the post and replace the first text with "ADMIN-Please Delete this Post" and Either myself or one of the moderators will delete it when we see it...
I have no idea why you can't paste the URL for your photo in the "pop up thingy" ( thanks for using technical language that all of us can understand
) I do it all the time and it should work for you.