jarvan, I haven't done this but I found these two recipes on the internet for you.
Good luck and let us know how it goes!
I've never tried it myself, as I prefer rosewater, but I did find a couple of recipes! They're in swedish, though, so I'll translate.
Recipe 1:
4 parts oil
1 part roses
Put the roses in a jar and pour oil over them. Put in a sunny window and let sit for three days. Then take the roses out, replace with new ones and repeat the process. After the third batch of roses, the oil is finished. Pour out through a piece of fabric.
Recipe 2:
Oil
Rose petals
Salt
Cotton
Put some salt in the bottom of a clean glass jar and put a layer of clean, fresh but dry rose petals. Then cut out a piece of cotton to cover the rose petals. Pour oil over the cotton so it's drenched in it. Keep repating this process until the jar is full and tightly packed. Then put a lid on the jar and let it sit in a dry, sunny place for two weeks. After two weeks, replace the lid with a piece of cotton fabric tied over the top, then turn the jar upside down so the oil pours out. This should take a few days.