If you use $vboptions[bburl] instead of the domain name people won't have to change it.
And the image url needs to be:
Code:
<td class="alt2"><div align="center"><span class="smallfont normal">
<input name="textfield2" class="bginput" type="text" value="$vboptions[bburl]/album.php?$session[sessionurl]albumid=$albuminfo[albumid]&pictureid=$pictureinfo[pictureid]" size="50" READONLY>
</span></div></td>
If you want it to link back to the image page and not just the image.