Info on motor mounts?
 

Hi, I wrecked my girlfriends 93 4cyl manual trns ranger today. Rear ended an f-250 about 25mph. Yes, my neck hurts. Anyways, after taking off the bumper, I could see that nothing else was really damaged, so why was the fan in the radiator (almost)? Ahh, the motor mounts broke! Also the crossmember holding the tranny is bent. It appears the motor moved forward a little less than two inches. I don't see any other serious damage. Here's the questions.
1. Any other possible hidden damage? I know the frame might be tweaked...
2. How difficult to replace motor mounts? I replaced a pair on a 1980 volvo once, wasn't too difficult...
3. Are those mounts filled with oil? Oil dripped from underneath for a while, appears to have stopped now.
4. Any other reasons I should scrap it and move on? It runs well and is useful to us.
Thanks in advance!