OK, I don't normally do this, but here's my idea (well, not really my ideas, taken from some places)
I'd keep the main game pretty much like it was. I liked the idea Inquisitive one had with the three boxes like the Instant Cash. But I'd have one box have the jackpot, the other a $15 money card, and the third a nice prize (like in the Aussie version, but they used playing card suits).
Now for the end game (hopefully I won't be accused of mo money syndrome):
Part One: Ten in a Row
This is pretty much taken from the Aussie version, except it's played first. The player has 60 seconds to get 10 correct answers for a top prize of $100,000. With each correct answer, the player moves up a "ladder" (a la Weakest Link): $1K-$2K-$4K-$6K-$10K-$15K-$20K-$30K-$60K-$100K. The difference between this and the Aussie version is a player can stop before a question is asked (by hitting a button, like the bail out on the Wonderwall) and take whatever money they have.
Part Two: Shopping
Whatever money won (if any) is placed in the bank. This part is like the old version, they go shopping for prizes. The player can only play Ten in a Row if they've reached a new prize ladder. (Unlike the new Aussie version, the player must purchase the prizes with the main game winnings). The player may purchase the prize and take whatever money accumulated from 10 In a Row. This means that the first prize will no longer just be an automatic no. If a player wins $60K in Ten in a Row, that small prize looks more tempting. Same with later prizes. Obviously the prizes get larger, with trips, cars, etc. They will not play 10 in a Row when they reach the level of all the prizes. The final level is all the prizes, plus $500,000 cash (No Bullion here!), plus the money won in 10 in a Row.
I know, it's a lot of money, but if the Australians can do it, why can't we?!
David