WACOMalt
After clicking the "Change software installer settings" button you would have seen a list of respositories.
These are the repositories used by yum.
The defaults for sme7RC1 are
SMEServer - addons
SMEServer - os
SMEServer - updates
These repositories are considered "safe" by the developers.
If you wish to add other repositories in order to download other rpms not listed, then search these forums & elsewhere for suitable commands. The answers have been previously given.
I also suggested other locations to search as all of those places have posted various details about using yum with sme7.
I also gave you a link to read & learn generally about yum, the idea being for you to learn what yum is all about before blindly using it.
If you install inappropriate rpms from inappropriate repositories you could stop your sme server from working.
> ...I assume its one of these 4. remember I need a version that will
> work with my php forum, if that matters.
You would install all 4 rpms , but they need to be compatible with sme7 OS. If you copy these to a empty folder on your sme server, then do
rpm -Uvh *.rpm
you will get an error which will also advise you of some other rpms that also need to be installed ie dependencies.
You can search
rpmfind.net
for just about any rpm you are after, but make sure you download ones that suit your operating system.
Hope that steers you in the right direction.