I accidentally deleted EVERYTHING in that folder (obviously very unintelligent, happened when I was trying to just erase a symbolic link POINTING to it!!!!!!!!!!!!!) and I don't even wanna TRY rebooting my system till I figure out what to do.
Will simply compiling the kernel again remake this folder? And what is it exactly that I would have lost I'll have to put back again?
ACK!!!!!
I'll never type rm -rf again!!!!!!!!!!!!!!!!
(I'm currently in a Live CD environment so I can work with this, because I was having kernel problems anyway)

You probably don't even need to re-compile - switch to your source tree (highest level as normal) and try a make modules_install.
Presumes a 2.6 kernel.

Moved to Linux-General at OPs request.

'make modules_install' will put back all modules you built with kernel. However, you'll need also rebuild modules built against kernel source if you have any. Some DRI or wireless driver or whatever you had there.

I noticed that doing this didn't put back modules I had to install myself, such as ndiswrapper. Is there any way to get ndiswrapper back without having to reinstall it? The problem here is that anything else I can get by updating through the internet, but without an internet connection I can't get at ndiswrapper. Heh heh heh. Unless I moved my computer upstairs and attached it to the router with an ethernet cable.
The problem is that I can't just download the tarball upstairs and move it downstairs via USB or something because I use Portage to install things, the package manager with Gentoo. Hm..

Edit: Oh, you answered my question. Hm... I think I'll physically have to move it upstairs then. @_@ Oh well

If you had it installed then it resides in /usr/portage/distfiles. No need to download it again.

A corollary of that of course is that it is certainly possible to download on one system and transfer to another.

Thank you. I was lucky enough to still have ndiswrapper in /usr/portage/distfiles. I delete all of its contents often because I am VERY tight on disk space (like 10 gigs total). I'm back up!
AND I fixed my kernel. It was not working before. I'm almost 100% sure it not being about to mount /dev/hda2 as my root device arose from me changing ATA/ATAPI/MFM/RLL support from * to M.
And I finally compiled a kernel without the use of genkernel, which was happy. I never really used genkernel anyway, I just used it with menuconfig, and selected what I wanted, which is practically what a manual install is anyway, I guess.
THANK YOU!!!!!!!!!!

If you're running gentoo, there is very little reason to run any modules.
Exceptions as noted by Emerson excepted of course ...