Thanks for the response but the first problem is that since it won't go into debug mode I can not back up to my computer. It won't recognize my phone at all. Not even in DoubleTwist due to the fact that it stays on "Samsung Kies" selection. But even if I have to lose everything I won't mind as I've only had it for 2 weeks and I can write down all my downloaded apps.
Ah, right. Do you have an external SD? If you do, you can download an app like Root Explorer from the market and back up all important files to the external SD w/o ever mounting to a computer. It's slightly tedious and a little slow so keep that in mind.
Second;y, are you saying all the recovery can be done from the captivate itself with no need for my computer? If so THAT is what I needed. Now the SD card already has ClockworkMod and Update.zip on it...can I just use that instead of having to download another? Of do you think that one is corrupted?
Yes, Clockwork recovery is the main/only way to flash new ROMs w/o using a computer with Odin. there are options like Wifi File Explorer that will let you transfer file to and from your internal SD without a USB cable. Look into something like that as a solution to get the necessary files to the internal SD.
Also ClockworkMod
IS your update.zip. Meaning your ROM could be named whatever as you'll be able to select it manually after the update.zip (CWM) is installed.
I would love to upgrade to 2.2 if it is possible to do so by device only rather than using a computer since I only own Mac's. So then can I download a custom ROM for 2.2 and just rename it update.zip? I can transfer files to my phone by bluetooth if i need to do anything to edit them on my computer first, as I can also email files to my computer from my device. So the file link you included, what is that if it is not a ROM?
If this was me, my main concern would really just to flash anything that will work right away as a stop-gap until you can flash a stock 2.1 with Odin to get a clean start. As soon as you flash anything go straight to debug menu and see if it works for you- if so, the hard parts over.
Going to 2.2 after reinstalling stock is fairly simple (2.3 slightly more complex- I recommended thorough research before flashing 2.3). Again, the main thing I'm thinking, for now, is just getting you a fresh start so you can flash whatever you want from there.
The hardest part about helping you, for me, is I just don't know the "limitations" of Macs and Odin and Android.
I think thread may be of some use to you for returning to stock w/o USB and Odin -
[STOCK ROM]Use for going back to stock before flashing a custom ROM with minimum risk - xda-developers