the package should be called something like amarok-1.4.6-i586-1vl58. I guess you're using standard, as SOHO comes with amarok by default. You'll have to add a 'patches' repository in gslapt, or it will probably start whining about not being able to find some dependencies (more specifically qt-3.3.7).
To add a repository, open gslapt, go to preferences (CTRL +P) and go to the 'Sources' tab. You can add this repository: http://vectorlinux.osuosl.org/veclinux-5.8/patches/
Don't forget to click "Add" before clicking OK.