1. Launcherpro. It is free, it replaces the touch wiz UI allowing for complete customization of your UI, you really get to set it up the way you want. You can also use it to "speed up" certain things, like app launches, scrolling and stuff. It is 100% safe, legal and wont void your warrenty. You can also hide the shortcuts to the crapware.

2.Titanium Backup: Not only does it back up your apps and stuff, but you can use it to "freeze" the bloatware apps and keep them from autolaunching and gobbling up your battery and data.

It is unadvised to actually delete the stock apps. There has been many problems reported by people after doing so. But with the above methods you can easily pretend they arent there without risking any problems later.

Lag "fixes" are a mixed story, some work, some dont, some are safer than others. None are 100% garanteed safe. Using any of them would technically void your warrenty. That being said, personally, i'd prefer voodoo over the OCLF. Try launcherpro and crank up the speed setting a bit and see if that makes a difference before you decide to go hacking.

 

http://androidforums.com/captivate-...-what-difference-will-i-see-totally-lost.html

i just did what you are talking about/looking for and am very happy with the results.

 

Lagfix - CapFAQ

Uninstalling stock apps - CapFAQ

Then you definitely don't want to hack it up.

Keep using the Captivate FAQ. Most questions are answered there and it's kept updated.