As I replied to you on DevShed, assuming it was you, of course:

mySQL does support locking, so you can reliably retrieve the last ID from it with a normal SQL query.

It might flow like this: 

prepare your insert statement and get all your data ready,
lock tables
execute your statement and insert the new data
retrieve the last id (which will be from what you just inserted) with 
+a select query
unlock tables
do stuff with your id
[download]

Just remember to keep your tables locked for as short a time as possible.

-Any sufficiently advanced technology is
indistinguishable from doubletalk.