PeerList core module customization: Please help?

Hello,

I need to customize PeerList.tpl to do it's LoadPeers function, but with a fixed parentId, so the PeerList is always the same.

I've had a partial success by modifying Callbacks.inc (I modified the GalleryCoreApi::loadEntitiesById line below case 'LoadPeers':, which works for Entities who have the right parent, but gives nothing back when there's another parent involved), but of course ideally I'd rather do it through a local PeerList.tpl or something.

Can anybody please assyst in this?

Thanks in advance,

Loeki