I am not 100% sure about how banks do personal loans, but if you simply take out a personal loan for $xxxx.xx, you can spend it how you want but again, I am not the person to ask about that.

On the note of financing flight training, I agree with Rotor2prop, financing flight training is not a good idea. Although investing in a career is a much better thing to be in debt for (as opposed to a credit card or auto loan), a debt from flight training will NOT be cheap and it will take you years to pay back the debt. If you get into debt, you will have to pay it back once flight training is over and IF you are ONE OF THE LUCKY ONES, you can land a job at a regional making $24,000 per year (that is a GOOD paying regional). This is a recipe for financial disaster! Ask anyone who went that route!

If I could do it all over again, I would go to some cheap college for a degree in something useful, get a job in said useful field all the while saving and paying for my flight training while in high school/college/at said useful job until I had my licenses and time to get a flying job. Although it will take you MUCH longer to reach your aviation goals this way as opposed to taking out a loan, IMO the amount of financial anguish you will NOT have to suffer and the extra amount of enjoyment you will get out of the job knowing that you CAN actually live off of the salary at most first time pilot jobs will be well worth the extra wait.