Custom Post Type, Two categories, Two columns, Pagination

Hi, I searching a lot to found a way solves that and no luck at least.

Sorry for my unpulish english, I do my best explaining my issue.

I have a Custom Post Type called ‘Eventos’ this have two categories ‘Congresos en Argentina’ and ‘Congresos Internacionales’, I need to show the list of posts sorted by columns (2) and with pagination after 6 of each other.
Something like this:

Format: Cat 1 / Cat 2 [ 1 = most recent / 5 = oldest post ]

[1] [1]
[2] [2]
[3] [3]
[4] [4]
[5] [5]
< 1 2 3 >

I wondering if I can show the last posts of each category on a row and later the next one and so on, this because the design needs to be in this way to show up nicely.

Thanks in advance for your help, any comment would be appreciate it.
Regards,
Guille.-