What he said while I was busy tracking it down in the configs. The file tree goes something like this: Minecraft > config > powercrystals > minefactoryreloaded > common.cfg
at the very bottom of the file is this:
recipesets {
# If true, MFR will register its GregTech-based recipes.
B:EnableGregTechRecipes=false
# If true, MFR will register its Thermal Expansion-based recipes.
B:EnableThermalExpansionRecipes=true
# If true, MFR will register its standard (vanilla-item-only) recipes.
B:EnableVanillaRecipes=false
}
you want to change EnableVanillaRecipes to true. If more than 1 are true, you can choose between them in game. This will also change all the other recipes back to MFR plastic machine blocks, etc.
If you don't want to hunt enderman 1st, there is also this in the middle of the page somewhere:
# If true, DSU can be built out of chests instead of ender pearls. Does nothing if the DSU recipe is disabled.
B:Recipe.CheaperDSU=false