So far as I know the download location is stored in the .info file which is stored in the Slackbuild tar file. I don't think using sbokg you can override this but I may be wrong. If not then just download the package from your preferred location and build it yourself or download the Slackbuild, amend this accordingly, (if the tar file has changed names), and download the differently named tar file. Then run the amended, (if it is amended), slackbuild script.
In other ( and hopefully simpler) words - I think the sbopkg way of running a slackbuild is dependant on the stored .info file download information. If yoiu want to do otherwise, download from the preferred location and if the source code name has changed, amend the slackbuild otherwise just run it.
This was the way of running a slackbuild before the marvellous sbopkg came about.
Last edited by bgeddy; 06-11-2010 at 02:58 PM.