I'll post a follow up to register and later think how write it on wiki.
I've found another way to do this, via script (wpkg.org)
<!-- Win7 instala Drivers -->
<install os="ultimate.+6\.1\.\d{4}" timeout="60" cmd='rundll32 printui.dll,PrintUIEntry /ia /m "HP LaserJet P2050 Series PCL6" /f "\\servidor\intranet\files\Drivers\IMPRESSORAS\P2055DN\hppdp613.inf"' />
<!-- Win7 -->
<install os="ultimate.+6\.1\.\d{4}" timeout="60" cmd='rundll32 printui.dll,PrintUIEntry /if /b "P2055DN no Servidor" /f "\\servidor\intranet\files\Drivers\IMPRESSORAS\P2055DN\hppdp613.inf" /r "\\servidor\hp2055dn" /m "HP LaserJet P2050 Series PCL6"'/>
The first command copy drivers from network location to local computer.
The second one install the printer using that driver.
This is a sub-optimal solution (drivers still not in server to autodeploy when connecting to printer, but It's what I was able to have working for now.
I have a network with some old WinXP and moving to Win7/8/10 as new computers are bought.
For now we'll start migrating WinXP to Win7 where HW allow us to do it!