Dis-assembly of HP 5L

I am working on an HP 5L with a supposedly common problem – paper jam. The fix is detailed on several web sites. The problem is getting to the problem area.

Is anyone familiar with how to take the plastic outer case off of this printer? I haveremoved all the usual screws, and I just can’t see what is keeping it on.

Could anyone detail how to get the shell off without breaking it ?