I have a bit of a problem with my case. Antec 900.

it's shown with pictures in this thread, but i'll repost them here too so you can see.
http://www.sweclockers.com/forum/61-stationara-datorer-suppor...

the motherboard screws are where they should be but my GPU and PCI slots doesn't reach the screw holes on the mounting place for gpu and sound card... what would be your best solution to this?

Thanks in advance.