Thats exactly how I do it too.
Open the full size pic, copy the code and replace the original part with it. But it takes
1 extra minute!!!!!
Would you be willing to sacrifice one extra minute for all of us? We would greatly appreciate it!
So, if you are willing, and if everyone else is willing, here is what you do:
1) You get your forum code from flickr, which is something like this [ URL= imageurlwithads ][ IMG ]previewimageurl[ /IMG ][ /URL ].
2) When you paste this code, this is the link it is linking to:
http://www.flickr.com/photos/bmxmitch/5742093443/
This is the page where the image is not seen at it's full size and it has all of the adds and what not. (the irritating page)
3) Click the image from the above link, and it takes you to here:
http://www.flickr.com/photos/bmxmitch/5742093443/lightbox/
This page still isn't the full size that I'd like to see. So...
4) Click the "View all sizes" link at the top right of the above page. It then takes you to here:
http://www.flickr.com/photos/bmxmitch/5742093443/sizes/l/in/photostream/
This page is still not the page I want to see. So...
5) Make sure you are viewing the largest size possible. Then right click on the image and choose "View Image". That takes you to this link:
http://farm3.static.flickr.com/2703/5742093443_ed876d6365_b.jpg
That's what I want to see!!! A page that is just your picture with no adds or garbage surrounding it. So...
6) Go back to your forum code, which is [ URL= imageurlwithads ][ IMG ]previewimageurl [ /IMG ][ /URL ] and replace the "imageurlwithads" with "http://farm3.static.flickr.com/2703/5742093443_ed876d6365_b.jpg" and this is what you get:
Any questions? It's not that hard. A baby could do it!
And one other downfall of flickr is, the largest size you can get is 1024px. Perhaps there is a way to get it at the original size, but I have never seen anywhere where the size is larger than 1024px. Not that it's a big deal, but I'm just saying.
Have a nice day!