Newbie learning GRUB. Help thread!

[noob420]

After over 3 years SS finally gave me my disability. I realized I now have a brain with nothing to do! LOL Quit drugs over 4 years now(clean & sober). That used to take up a huge part of my brain and then homeless, unemployed 3+ years. Surviving that took up the big part of my brain, but that is over now.
 So, I figured that since people have told I should do computers. I fix them for fun. Also since I want to learn command prompts as I was told that since I can do so much from a GUI, I would be dangerous if I learned them! LOL
 Grub is the start so that's where I am going to start!
 1st project: make a Grub app. that will load distros. Like PCLinuxOS has (impressed me and luv it, so easy)
Here my 1st quick question after having read some of the manual. To save disk space could I compress the ditros? and have grub uncompress on the fly? right?
 2nd: a problem with my usb wireless (netgear wna 3100) on the newest distro kernel. So I was thinking is it possible to put the update to kernel in GRUB and get it installed?
Update from WIKI
    http://sourceforge.net/apps/mediawiki/ndiswrapper/index.php?title=Netgear_WNA3100
Add the following to ntoskernal_io.c

wstdcall NTSTATUS WIN_FUNC(IoUnregisterPlugPlayNotification,1)
(void *tag)
{
      TRACE2("%p", tag);
      TODO(); /* Probably Not, legacy function abandoned in Windows 7 */
      IOEXIT(return STATUS_SUCCESS); /* Linux doesn't use it either */
}

Any help I will be thankful for your time!
 If it helps I am a US Veteran.

[Just17]

Grub is a boot manager, which - based on the information in its configuration files - looks for and loads an OS which then runs on the PC.

It can pass various boot options to the OS it loads, and also has the facility to display the boot list on a graphical background.

Considering my interpretation of your questions, you appear to be under the impression it is something other than that.

[noob420]

My question is about GRUB and what it can do. I think you can use to make make changes to system files ie: which kernel to load. So if I do the updated to the kernel file after I copy it and modify it I can have GRUB load that kernel on the next boot? I think?
Maybe I posted in the wrong place? I am a newbie at this! LOL If so let me know and My Bad.

[Just17]

I have no ideas regarding the correct location for the post .....  others can determine that 

Grub can locate and launch a specific kernel or can launch another boot manager, which it generally does when one boots Windows from a Grub screen.

I think you can use to make make changes to system files

It does not change any files on the system which it is calling to boot ......  it can pass options to the booting system, which is a completely different thing.