new install 140 or 141?

am installing integramod ofr the first time [new to it] and need to know:
there is a template for the 140 version that totally suits my site: Slate BII
but I could see for sure if it is only compatible with 140.
If that is the case,I rather install 140 - but
if I do that what is the drawback of not having 141?
Since I could really not find a in-depth de.scription of each version or what is included really:
like it states that version 141 has IM Portal integrated - which would really be cool, but I only see everywhere [in the templates] 2 columns versus 3.
I would want 2 columns with the shoutbox in the left.
For a newbie to integramod it would really be helpful if someone could answer my question:
what exactly do I need to get this:
3 columns, template Slate BII
also, read up on the 'annoying pink window' - where can I disable that?
Really appreciate anyone's feeback on my questions.
Thanks

there is a template for the 140 version that totally suits my site: Slate BII
but I could see for sure if it is only compatible with 140.
If that is the case,I rather install 140 - but
if I do that what is the drawback of not having 141?
Since I could really not find a in-depth de.scription of each version or what is included really:
like it states that version 141 has IM Portal integrated - which would really be cool, but I only see everywhere [in the templates] 2 columns versus 3.
I would want 2 columns with the shoutbox in the left.
For a newbie to integramod it would really be helpful if someone could answer my question:
what exactly do I need to get this:
3 columns, template Slate BII
also, read up on the 'annoying pink window' - where can I disable that?
Really appreciate anyone's feeback on my questions.
Thanks

