I have a question,

Which version of PnP DnD are you basing your updated spells on?

2nd Edition
2.5th edition (Players Options books - mostly little change from 2nd ed. unless one of the varient magic systems was used).
3rd Edition
3.5th Edition (It looks like you are for Summon Monster # and Summon Nature's Ally # - OTOH, the 3rd/3.5th ed. monster summoning/summon monsters are probably a better fit of the BG II monster summoning spells than the 2nd edition versions).

-or-

A mix of 2 or more of the above?

From what I am have seen, it is AD&D 2E, D&D 3E and Galactygon's houserules.

-Echon

You seem to read my mind these days, Echon.

-Galactygon

These kind of combinations are quite familiar to me...
We think similarly sometimes, you know...

The way we use those sources are quite different. Both of us have a slew of disagreements on the concepts and implementation.

-Galactygon

While the implementation has its clear differences, the basic concept remains similar. Anyway, at least we have the right to legally criticise each other's products...