Minitutorial que han puesto en XDA para P4 (P7500 o 3G):
1- get the files from here:
http://droidbasement.com/galaxy/roms/cm10/p4 and here:
http://goo.im/gapps/gapps-jb-20121011-signed.zip
2- make a backup
3- wipe cache
4- advance -> wipe dalvik
5- put your galaxy tab in Download Mode - press and hold the Volume Down + Power buttons together. Release only power button when you see Samsung logo,
6- press the Volume Up button to enter into Download Mode.
7- connect your tab to your PC, and start odin 1.85
8- flash the bootloader bootloader.tar.md5 with odin 1.85
9- flash the recovery recovery.tar.md5 with odin 1.85
10- in cwm 6.0.1.5 flash cm-10-20121018-EXPERIMENTAL-p4.zip
11- in cwm 6.0.1.5 flash gapps-jb-20121011-signed.zip
12- reboot and enjoy
No lo puedo probar ya que la Tab la tiene ahora mismo mi hermano.
Saludos.