I'm also working on a 64bit windows 7 installations on several different computers with different hardware. In some instances I've experienced instability in sketchup that makes the software unusable. It will constantly crash for seemingly random reasons though most commonly when processing polygons such as when exploding a group or when running a plugin that creates polygons. It also tends to do massive amounts of lag when running autosave or when opening files of any size.
Through trial and error I've found that the issue is not directly Sketchup but something to do with multi-core processors on certain motherboards. It may be the bridge or threading technology integrated into the board that's at issue. I've only had this problem on boards using DDR3 PC1333 Ram and Intel processors but the ram and processors involved may or may not be a coincidence.
Generally I've solved this issue on my machines by going into the Windows Task manager, showing processes from all users, finding the sketchup process, right clicking on it and selecting "set affinity" and chosing a single core for processing. This effectively eliminates multi-core processing but Sketchup didn't multi-thread anyway. it means my system specs are over kill for sketchup but it makes sketchup at least usable in the environment.

Ok, i'm not sure if this is possible but I am wondering if it is possible to make a line drawing and paste it onto a 3d surface using these tools. I basicly want to draw a logo in sketchup, paste it onto a curved surface before manipulating the various thicknesses on it to make it 3D.

any ideas?