Any old Qbasic gurus out there willing to help.?

I'm using Qbasic v4.1, for a year 12 major project. because Qbasic in a prehistoric language, it has some major set backs. One of these problems is the amount of memory it can use, which is 64kb, the integrated motherboard ram. I know theres ways to get around this, i'v tried making a separate exe and invoking this one when my other one got to big by using the SHELL command though CMD. the problem with this is that the stack does not reset, thus not solving my problem. I know u can do something which allows u to unlock extended memory. any hlep will be appreciated.