Dear fellow Xooper :P

I had setup two different website:
one is XOOP portal: http://job.everyonemarketing.com
another one is OSCMALL Shopping Mall: http://mall.everyonemarketing.com

I'm sure u all know about Xoops. so let me introduce abit about the OSCMALL:
Oscmall is a trully multiple vendor and multiple shop Shopping Mall System.

My intention now is to merge this two system so that every customer created in the Mall system will also automatically been given a membership in the Xoop while remain the design of this two independent system inattached. Can be two website link with hyperlink.

In other word, I want to reward the customer with full range of XOOPS function and also to give the mall the look and feel of a true shopping mall. I would like to let my customer to enjoy some flash games (Xoops Module), forum, chat room, gallery, blog and so on.

The challenge:
1. I'll design a XOOPS theme that will synchronize with my shopping mall's design. so when the customer switch the site, they will never feel the different

2. to rewrite the sequence of the customer registeration proccess so that two system can use a single id.

3. session? login problem. I dun want my customer to login everytime they switch site

I need your help, advise, opinion, suggestion especially for the 2&3 option above. Feel free to give any comment as well.

I'll need an easier way to implement this with the less changes possible so that it will be easier for me to update next time