Redsnow

Redsnow for iPhone 3GS

Redsn0w
There is no any different version of redsnow for iPhone 3gs. You can use normal redsnow latest version to download your iPhone 3gs phone

Currently latest iOS version available for iPhone 3GS

http://appldnld.apple.com/iPhone4/041-3307.20111109.5tGhu/iPhone2,1_5.0.1_9A405_Restore.ipsw

If you are downgrade another previous version jailbreaking is very easier than latest version

Redsnow iPhone 3gs jailbreaking is very similar to iPhone 3g jailbreaking

Please read Redsnow to Iphone3g.

This video tutorial very similar to Redsnow for iphone 3gs becase technical resourses and hardwares are same for this both phones
Redsn0w Download

Redsnow jailbreak

Redsnow untethered jailbreak
Downloading Redsnow for iPhone 3gs is same as downloading Downloading Redsnow 3G

Download Redsnow for iPhone 3G
[Redsnow for iPad]
[Redsnow for iPhone 3G]
[Redsnow for iPhone 3GS]
[Redsnow for iPhone4]
[Redsnow for iPod]
[Redsnow for iPhone5]
[Redsnow for iOS]
What is the DFU mode?

IPod DFU mode
Ipad DFU Mode
Ultrasnow Download

Redsnow vs ultrasnow

Yellowsn0w download