I've never made a Dresden Plate so I probably can't help you, but I'm sure that with all the excellent quilters on here, somebody surely can.
This is funny (a funny coincidence), because I just answered on another post about "how to keep the points in star blocks". I'm not real familiar with the Dresden Plate so I don't know if the info I gave would help you or not. Here's a link to it, if you want to check.
http://www.quiltingboard.com/t-42055-3.htm#953427
Hope it helps you.
Marilyn
Good luck.
Marilyn