LordAO. The real problem here is that this entire thread no longer belongs on the rules board. The question was "can you?". The answer is "no". Any other options, decisions, trains of thought, etc, belong in the house rules thread. The simple fact that the thread continues to exhist here is the primary cause of all the backlash. On the house rules thread, there is a lot more open mindedness, simply because that is where you change the rules. You don't change the rules here. A quick proposal of how someone handles a rule differently, or an interpretation of a rule, is fine, but anything prolonged will get beaten to death so long as the thread exhists here.
The bottom line is this. There is no way to increase your BAB except by leveling. If anyone wants to compare the Wish spell with a small +1 BAB increase, simply look at the Epic Prowess feat, an Epic feat mind you, and you'll know that a +1 BAB increase is far outside the power of Wish.
If anyone wants to "fix" this so-called "broken" rule (actually, this thread isn't about "fixing" a rule, but it's about altering the core system), do so on the house rules board. That's what it's there for.
Of course, that's just my opinion, I could be wrong.