Redsnow is still capable of jailbreaking the latest iOS 4.3.5 firmware for iPhone, iPad and iTouch and now you can jailbreak your first-generation iPad with this jaibreaking tool. For jailbreakers, its very similar to iOS 4.3.4. Redsn0w 0.9.8b3 can jailbreak iOS 4.3.5 as it was able to jailbreak iOS 4.3.4 and 4.3.5 is released to fix a security vulnerability with certificate validation…………..
Create a folder on your desktop called Pwnage
Download RedSn0w from here and place it in the Pwnage folder. Likewise, download the latest 4.3.4 and 4.3.5 firmware from below and place it in the same folder.
Once iTunes has finished updating your iPad to the desired firmware open the Pwnage folder on your desktop and launch the redsn0w application from the redsn0w folder we extracted earlier.
Once this is complete you will be notified that RedSn0w is done. Click the Finish button. When your iPad finishes rebooting (5 minutes or so) it will be jailbroken with Cydia on the SpringBoard.
Since this is a tethered jailbreak you must use Redsn0w to help you boot back into your jailbroken device if its powered off for any reason. Simply connect your iPhone to the computer, launch RedSn0w, select Just boot tethered right now from the options window and click Next to have RedSn0w boot your device.