Stopping screen flashing?

[Tim Tester]

Hi folks. I'm a new user evaluating the demo version of SF6.0.0.4. I have various actions in the before & after events of some of my screens. The action progress dialogs looked terrible, when they displayed (very briefly) between the oither screens. I got rid of them by setting %ShowActionProgressDlg% to False, but now, the desktop background shows through briefly as I go from screen to screen. Thus, is there any way to say to SF6: "Do not erase a screen until all of the relevant after & before actions have been completed, & the next screen is actually ready to be displayed"?
TIA :confused