Basic Army Builder question related to this data file

[bifpowell]

Sorry to ask a stupid question - when I load army builder and load the space marines data files for 4E, it works really well, but I just want to add a Space Marine and I can't find them anywhere?...I'm kind of new to wh40k so maybe it's there but under a commonly accepted name?...

...or a tutorial that answers that and other questions about this datafile - youtube had some things, but not that went into this that I've found yet.

Thanks.