Welcome. Um, not to be that guy, but I do not believe Mindcrack pack will get an update any time soon. It requires that the Mindcrack users on youtube, (DocM, Generkib, Etho and the others) request that the pack be updated. As of now they have been playing vanilla only, iirc. It will probably need to be rewritten if it does come back as there is no RedPower2 yet beyond v1.4.7 Also if the Mindcrack users on youtube want those mods then they will be in the pack, if they do not then they will not appear. Sorry you must convince them like you would have to convince Direwolf20 to add his something to his pack.
If you want these mods in the 1.6.x and 1.7 (if and when the packs get updated), that are not decided by the Youtube user, then that might be more possible.