So after finding Pinta's OraFormat.cs and pitching it at others here, null54 came to the rescue and fixed everything. And shrike asking to publish it, here's my attempt.
Thanks go to Maia Kozheva and null54.
OpenRaster Plugin (source)
Just run it Agree to license and press Install. It'll find the folder by itself.
So there it is, hope it works and.... something.
Edited by Zagna, 18 February 2011 - 07:34 PM.