Yes, is this what you already tried though?
You should first uninstall any previous version of Flash Player, using the uninstaller from here (make sure you use the correct one!):
http://kb2.adobe.com/cps/865/cpsid_86551.html#prob1=uninst,os=m10.6,
Download this if you haven't...
http://fpdownload.macromedia.com/get/flashplayer/installers/archive/fp10.1.102.6 4_and_9.0.289.0archive.zip
Once downloaded if it doesn't unzip automatically the double click on that file.
Look for the fp10.1.102.64_and_9.0.289.0archive folder, open it, look for the Flash Player 10.1.102.64 folder & open and look for 101r10264 folder & open it, double click on the flashplayer101r102_64_ubmac.dmg file, choose the Install Adobe Flash Player file to install... they don't make it easy!
Or I put up the smaller ones here...
http://dl.dropbox.com/u/450421/flashplayer10_1r82_76_ub_mac%20copy.dmg.zip
Stand alone player...
http://dl.dropbox.com/u/450421/LastFlashPPC.zip
I guess the best version is 10.1, is that right ?!
Yep, 10.1.102.64 is the absolute latest for our PPC Macs.