Add-on Product" vs "Installation Source"

[needee]

OS: SLES 10 SP 1.

I have installed the OpenOffice Novell edition on SLES 10 SP 1 from the media of SLED 10 SP1.
What i did is, simply
# yast2 inst_source
that is in Yast > Installation Source add the iso image of sled10 sp1.

But I found that same could be done using the "Add-on Product" option in Yast.

so I wana ask that whats the diff in b/w "Add-on Product" and "Installation Source"

whats the actual usage of Add-on Product ?
atleast for me both are same.

please also let me know about "Installation into Directory" in Yast. whats the usage ?

Any help/url/tutorial will be highly appreciated

Regards
Needee

[bigtomrodney]

Yeah I always found Add-on Product to be the same as a repository and just left it alone. I'm not sure if there's a technical difference.

"Installation into Directory" is a seperate and unrelated module for installing an operating system so that you can run it under Xen virtualisation. You can install it into a directory rather than using virtual hard disks because Xen requires modified kernels to run anyway.

[needee]

Hi bigtomrodney
thanks for reply/help.

bigtomrodney if you can please explain it(Installation into Directory) into more details ?
I do have a little understanding of XEN, as i have already installed xp, redhat under XEN.
or if you can please share any good tutorial about "Installation into Directory" so that I can understand it.

it would be highly appreciated If anyone here can also let me know the "Patch CD Update" option available in YAST.

and again ..
I wana ask that whats the diff in b/w "Add-on Product" and "Installation Source"

Please accept the apologies from my side on asking so much questions.

Regards
Needee