What Does The Prayer Really Say?
W D T P R S

Sometimes when people are not sure of their future positions, they hesitate to accept appointments for distant dates.

In November 2006 there will be a sacred music conference in Rome for the 50th anniversary of the death of Lorenzo Perosi.  There will be some interesting events.  Among them, I read:

Venerdì 24 Novembre 2006

16.30  Vespri, presiede S. E. Mons. Piero Marini, Maestro delle Celebrazioni Liturgiche Pontificie. Patriarcale Basilica S. Pietro – Cappella del Coro.

COLLECT
Deus, qui ineffabilibus mundum renovas sacramentis,
praesta, quaesumus,
ut Ecclesia tua et aeternis proficiat institutis,
et temporalibus non destituatur auxiliis.

A form of this prayer was in the ancient Gregorian in the Hadrianum manuscript "FERIA VI AD SANCTUM EUSEBIUM" which means that it was a Lenten prayer on Friday at the Station indicated.  In the pre-Conciliar Missale Romanum this was used on Friday of the 4th Week of Lent.   In the modern stations observed in Rome today is at Ss. Quattro Coronati al Celio.

Destituo is "to set down; to set, place anywhere" and "(Lit., to put away from one’s self; hence) To leave alone, to forsake, abandon, desert (derelinquo, desero)".  

Blaise says that institutum in the plural is, ehem, "institution" (that’s French), providing, "sacri mysterii".  These are things established by Divine Providence.   The L&S says "a purpose, intention, design; an arrangement, plan; mode of life, habits, practices, manners; a regulation, ordinance, institution; instruction; agreement, stipulation".

LITERAL TRANSLATION
O God, who does renew the world with sacramental mysteries which can’t be described with words,
vouchsafe, we beseech You,
that Your Church may both benefit from eternal providential designs
and also may not be bereft of temporal helps.

It might to tempting to latch onto the military overtone that the plural of auxilium generally bears and, with words like proficiat (which can be "advance" or "make progress") together with the sense of design or purpose inherent in instititum.

JUST FOR FUN A VERSION FROM AN OLD HAND MISSAL I FOUND ONLINE
O God, who hast ordained thine ineffable sacraments for the regeneration of all men : we humbly beseech thee, that thy Church, being profited by the same to her advancement in all things spiritual, may likewise fail not of thy succour in all things temporal.