Modify Power Manifester Level for "Un-manifestable" Powers

[Quintain]

Is there any way to modify a character's caster level as checked by the pre-requisites of a power as it relates to whether the power level is too high or not?

Example:

The Body Snatcher prestige class allows the Mind Switch power to be added to the class power list at 1st level of the prestige class. Sometimes this can be earlier than is otherwise allowed based upon the manifester level of the non-prestige class + the manifester level of the prestige class.

It gets around this requirement by setting the manifester level for that power as follows:

A body snatcher’s manifester level for mind switch is equal to her normal manifester level plus her class level, which may allow her to manifest it even if she could not normally do so. This improves its level-dependent parameters, including the limit on Hit Dice it can affect and the amount of power points that can be spent manifesting it. For example, Valis, a telepath 11 / body snatcher 4, has a manifester level of 14 normally, but manifests mind switch in all ways as if her manifester level were 18.

It does the same for the 9th level power version which is True Mind Switch -- which can be added to the class power list even if the class cannot manifest 9th level powers (such as the Cryptic).

Anyone have any idea on which tags need to be overwritten in order to get these two powers added to the class list according to the rules above?