x20 chipset block goes:
bolt>washer>mobo>washer>nut>block>spring>nut(big finger tighten one)
If you go to the XSPC website and look at the instructions for the Delta CPU block it works the same but with only 2 bolts
As for the bayres, thats rather odd... as 5 1/4" slots are standardised so it should fit in any =/ If you arn't going to be moving the case around then it should be fine just sitting there, but you might wanna get something to hold it in place...