LINK
http://www.immiersoft.com/index.html
after reading somewhere on the net about how intel makes the ppc cpu chips, its clear now that even over clocking will not work smoothly over a long period. intel actually tests all cpus and grades them accordingly. like my ppc has a PXA255 series chip running at 400mhz but they test all PXA255 series chips to see which ones will be steady at that speed, one that fail at 400mhz are used as 300mhz and advertised as 300mhz, so if u think a software will really improve your ppc, it may for a short time, but within a day, sometimes hours/mins it will start to act up. its just made like that. my ppc actually has a setting in the OS that lowers the speed to 200mhz, i have noticed it does run at this speed without problems, but once again i dont see my self using it regularly, 200mhz is noticeable when loading apps. it would only benifit if no radios are on, wifi/bt. also brightness should be lowered, these 2 things alone will save more battery power than any apps will ever attempt. 200mhz is noticeable when loading apps. just use the ppc the way it was meant to be used. stock performance. i get 2 1/2 hours with wifi on regardless of whatever app attepted. u can try the trial version, but make sure to do a FULL BACKUP 1st. dont say i did not warn you.
better to spend the cash on an extra battery, ebay has many at $15-25. doubles your battery life.