Never mind: downloaded - taking I only play Metroid II and LoZ: Link's Awakening via VBA...
Anyhow, ran into the exact same problem, but maybe explain the fix a bit better... Run the ROM (with 'Save Type" to "Flask 64k") then when it loads while displaying the blank "white screen", switch "Save Type" to "Flask 128k", then finally "reset" the emulator. Now once it re-loads, should show a "green foresty" scene instead of the "white". Not sure why you have to do this, but seeming to be a problem with the "battery" upon loading, hence needing of tricking it...
Let me know if it worked.