battery drain mystery So sick of jump starting girl's car every few mornings!!!!!

i have read many of the mystery battery drain posts.

my girlfriend 03 range rover keeps loosing battery power when it sits for more than two days.

one of the rr tech guys suspected something to do with moveable steering column??

wondering if anybody has a recent unexpired link to the andy cunningham battery drain trace procedures he wrote/

re alarm system BECM waking up/sleeping/waking up, is there a new RF part or service bulletin from the last few years???

is the RF bypass from Battery Drain on a Range Rover 4.0/4.6 advisable for a slightly mechanically inclined guy to do it myself, OR will a RR Dealer do it?

thanks mucho guys