Renderer from config

Is it possible to set the renderer from a config file? I can't figure out how to access to file i/o commands without defining a framework first. Example of what I want to do:

Global cfgRenderer
LoadCFG

If cfgRenderer = 1 then
     Framework BRL.D3D7Max2D
     SetGraphicsDriver D3D7Max2DDriver()
Else
     Framework BRL.GLMax2D
     SetGraphicsDriver GLMax2DDriver()
Endif

If I don't define a framework and just set the graphic's driver, it works OK, but the EXE is much larger.

I do it without problems.
[Pseudo code]

Framework Brl.Max2D
Import brl.glmax2d
Import brl.d3d7max2d
Import brl.blitz
Import brl.appstub
Import brl.audio
Import brl.basic
Import brl.blitzgl
Import brl.bmploader
Import brl.font
Import brl.freeaudioaudio
Import brl.freetypefont
Import brl.jpgloader
Import brl.map
Import other stuff...

If Get_INI_Value("GFX","Driver") = "D3D" Then
SetGraphicsDriver D3D7Max2DDriver()
else
SetGraphicsDriver GLMax2DDriver()
endif
Graphics( ...)

That works great, thanks a lot :)