Scrollbars and flickers oh my!

Here's a couple questions, maybe someone can answer one (or both!) of these: 1] It seems that one has *no* control over scrollbars whatsoever -- it appears to be impossible to make a scrollbar scroll up or down without the user dragging on it. Is there *any* way I can force a scrollbar to go to the bottom without the user having to click it? Failing that, is there a way to make it so a GtkText's scrollbar will follow outputted data? My GtkText box is for data output only, so it never has keyboard focus -- I need it, so when text is inserted into it, it will automatically scroll to the bottom. 2] Currently, my application involves a GtkTable, 16x16, of 32x32 pixmaps. I will often be updating this entire screen, rather than just one or two pixmaps. During certain large updates -- most noticably, along the diagonal -- the entire pixmap area will appear to "flicker". Is there anything like GtkText's freeze() and thaw() methods for pixmaps? Because if I could somehow make Gtk wait until I've made all my updates *then* display them, I believe the flicker would be avoided -- since I think it's trying to update *during* my while loop to place new tiles, I believe that's what's causing the flicker. ... If I can't do that, I'll probably end up writing it such that I combine all the tiles into one big pixmap before displaying them on the screen, which will be a bit of a pain but I believe that will avoid the flicker. Anyway ... if anyone has insight, please let me know! Steve