OpenERP 7 with modules from OpenERP 6.1
Openerp 6.1 modules directly can not be used in openerp  7. You have to do some basic changes 
in openerp 6.1 modules. Like tree, form tag compulsory string and verision="7" include in form. If you have inherited some basic modules like  sale, purchase then you have to do changes in inherit xpath etc. Some objects res.parter.address removed then you have take care of this and replace with res.partner. 
Thanks
I have couple OpenERP modules implemented for OpenERP 6.1 version. When I installed OpenERP 7.0, i copied these modules into addons folder for OpenERP 7. After that, I tried to update modules list trough web interface, but nothings changed. Also, I started server again with options --database=mydb --update=all, but modules list didn't change. Did I miss something? Is it possible in OpenERP version 7, usage of modules from version 6.1? 
Thanks for advice. 
UPDATE:
I already exported my database from version 6.1 in *.sql file. Will it OpenERP 7 work, if I just import these data in new database, which I created with OpenERP 7?