need help with htaccess redirect(s) to allow multiple domains on one modx site

i am consolidating 6 sites that are all done in different languages/cms’s and by different people into one modx installation. currently each site has it’s own domain. i’d like to be able to keep them having their own domains, so what i’ve done within modx is setup a tree structure like this:

ROOT
-> Domain1 (1) (weblink to [~7~])
---> Home (7)
---> About (13)
---> Etc (14)
-> Domain2 (2) (weblink to [~8~])
---> Home (8)
---> About (15)
---> Etc (16)
-> Domain3 (3) (weblink to [~9~])
---> Home (9)
-> Domain4 (4) (weblink to [~10~])
---> Home (10)
-> Domain5 (5) (weblink to [~11~])
---> Home (11)
-> Domain6 (6) (weblink to [~12~])
---> Home (12)

so currently you go to the site like http://www.domain1.com, which sends you to the homepage of D1, so you get http://www.domain1.com/d1/home, then if you click the links say to domain 2 and domain 3 you get:

http://www.domain1.com/d2/home
http://www.domain1.com/d3/home

so you can see the domain remains "domain1", but the "folder/directory" says "d2". what i’d like to do is write an htaccess chunk of code that says something like:

* if you’re on "domain1.com/d2" redirect to "domain2.com/d2", if it says "domain1.com/d3" redirect to "domain3.com/d3", etc...
* repeat for all other domains

is there a pattern for this that i could use? it’d be great if it remembered where the person was trying to go as well, like if a user typed in "http://www.domain1.com/d3/company/about" they would be sent to "http://www.domain3.com/d3/company/about".

perhaps something like (in no particular coding syntax, just pseudo-code):

if(part1 == ’domain1.com’ && part2 != ’/d1’){
redirect to ’domain1.com/d1/home’;
}else if(part1 == ’domain2.com’ && part2 != ’/d2’){
redirect to ’domain2.com/d2/home’;
}

does that logic make sense? anyone know how exactly to write that in .htaccess?

Try this: http://www.modxcms.de/multiple-domains-with-modx.html

Works great!

that looks incredible. going to have to parse it later today. thanks a ton!