Is this how you do it:
LT2: 110 rush yds., 37 Rec. yds, 1 TD
Rudi: 77 rush yds., 14 Rec. yds., 1 TD
Total: 187 Yds., 51 Rec. yds., 2 TDs
Then you give points for the total?
If so, instead of it being 1 pt. = 10 yds. rushing, you can just find a site that will let you give .1 pt. = 1 yd. rushing. The scoring is essentially the same then.
LT2 = 11 pts. rushing, 3.7 pts. receiving, 6 pts. TD
Rudi= 7.7 pts. rushing, 1.4 pts receiving, 6 pts TD
Total = 18.7 pts. rushing, 5.1 pts. receiving, 12 pts. TD
So you see no matter if you add the two together before or after assigning points it doesn't matter. Don't know if this is what you meant, but I hope it helps.